Avoid changing file_extra_cnt during deletion.
[rsync/rsync.git] / flist.c
1 /*
2  * Generate and receive file lists.
3  *
4  * Copyright (C) 1996 Andrew Tridgell
5  * Copyright (C) 1996 Paul Mackerras
6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7  * Copyright (C) 2002-2009 Wayne Davison
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, visit the http://fsf.org website.
21  */
22
23 #include "rsync.h"
24 #include "ifuncs.h"
25 #include "rounding.h"
26 #include "inums.h"
27 #include "io.h"
28
29 extern int am_root;
30 extern int am_server;
31 extern int am_daemon;
32 extern int am_sender;
33 extern int am_generator;
34 extern int inc_recurse;
35 extern int always_checksum;
36 extern int module_id;
37 extern int ignore_errors;
38 extern int numeric_ids;
39 extern int recurse;
40 extern int use_qsort;
41 extern int xfer_dirs;
42 extern int filesfrom_fd;
43 extern int one_file_system;
44 extern int copy_dirlinks;
45 extern int preserve_uid;
46 extern int preserve_gid;
47 extern int preserve_acls;
48 extern int preserve_xattrs;
49 extern int preserve_links;
50 extern int preserve_hard_links;
51 extern int preserve_devices;
52 extern int preserve_specials;
53 extern int delete_during;
54 extern int missing_args;
55 extern int eol_nulls;
56 extern int relative_paths;
57 extern int implied_dirs;
58 extern int ignore_perishable;
59 extern int non_perishable_cnt;
60 extern int prune_empty_dirs;
61 extern int copy_links;
62 extern int copy_unsafe_links;
63 extern int protocol_version;
64 extern int sanitize_paths;
65 extern int munge_symlinks;
66 extern int use_safe_inc_flist;
67 extern int need_unsorted_flist;
68 extern int sender_symlink_iconv;
69 extern int output_needs_newline;
70 extern int sender_keeps_checksum;
71 extern int unsort_ndx;
72 extern uid_t our_uid;
73 extern struct stats stats;
74 extern char *filesfrom_host;
75 extern char *usermap, *groupmap;
76
77 extern char curr_dir[MAXPATHLEN];
78
79 extern struct chmod_mode_struct *chmod_modes;
80
81 extern filter_rule_list filter_list;
82 extern filter_rule_list daemon_filter_list;
83
84 #ifdef ICONV_OPTION
85 extern int filesfrom_convert;
86 extern iconv_t ic_send, ic_recv;
87 #endif
88
89 #ifdef HAVE_UTIMENSAT
90 #ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
91 #define ST_MTIME_NSEC st_mtim.tv_nsec
92 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
93 #define ST_MTIME_NSEC st_mtimensec
94 #endif
95 #endif
96
97 #define PTR_SIZE (sizeof (struct file_struct *))
98
99 int io_error;
100 int checksum_len;
101 dev_t filesystem_dev; /* used to implement -x */
102
103 struct file_list *cur_flist, *first_flist, *dir_flist;
104 int send_dir_ndx = -1, send_dir_depth = -1;
105 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
106 int file_total = 0; /* total of all active items over all file-lists */
107 int file_old_total = 0; /* total of active items that will soon be gone */
108 int flist_eof = 0; /* all the file-lists are now known */
109
110 #define NORMAL_NAME 0
111 #define SLASH_ENDING_NAME 1
112 #define DOTDIR_NAME 2
113
114 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
115  * internally, even if this platform does not allow files to have 64-bit inums.
116  * The only exception is if we're on a platform with no 64-bit type at all.
117  *
118  * Because we use read_longint() to get these off the wire, if you transfer
119  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
120  * machine with no 64-bit types then you will get an overflow error.
121  *
122  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
123  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
124  * be truncated.  But it's a kind of silly thing to do anyhow. */
125
126 /* The tmp_* vars are used as a cache area by make_file() to store data
127  * that the sender doesn't need to remember in its file list.  The data
128  * will survive just long enough to be used by send_file_entry(). */
129 static dev_t tmp_rdev;
130 #ifdef SUPPORT_HARD_LINKS
131 static int64 tmp_dev = -1, tmp_ino;
132 #endif
133 static char tmp_sum[MAX_DIGEST_LEN];
134
135 static char empty_sum[MAX_DIGEST_LEN];
136 static int flist_count_offset; /* for --delete --progress */
137
138 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
139 static void output_flist(struct file_list *flist);
140
141 void init_flist(void)
142 {
143         if (DEBUG_GTE(FLIST, 4)) {
144                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
145                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
146         }
147         checksum_len = protocol_version < 21 ? 2
148                      : protocol_version < 30 ? MD4_DIGEST_LEN
149                      : MD5_DIGEST_LEN;
150 }
151
152 static int show_filelist_p(void)
153 {
154         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
155 }
156
157 static void start_filelist_progress(char *kind)
158 {
159         rprintf(FCLIENT, "%s ... ", kind);
160         output_needs_newline = 1;
161         rflush(FINFO);
162 }
163
164 static void emit_filelist_progress(int count)
165 {
166         rprintf(FCLIENT, " %d files...\r", count);
167 }
168
169 static void maybe_emit_filelist_progress(int count)
170 {
171         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
172                 emit_filelist_progress(count);
173 }
174
175 static void finish_filelist_progress(const struct file_list *flist)
176 {
177         if (INFO_GTE(FLIST, 2)) {
178                 /* This overwrites the progress line */
179                 rprintf(FINFO, "%d file%sto consider\n",
180                         flist->used, flist->used == 1 ? " " : "s ");
181         } else {
182                 output_needs_newline = 0;
183                 rprintf(FINFO, "done\n");
184         }
185 }
186
187 void show_flist_stats(void)
188 {
189         /* Nothing yet */
190 }
191
192 /* Stat either a symlink or its referent, depending on the settings of
193  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
194  *
195  * If path is the name of a symlink, then the linkbuf buffer (which must hold
196  * MAXPATHLEN chars) will be set to the symlink's target string.
197  *
198  * The stat structure pointed to by stp will contain information about the
199  * link or the referent as appropriate, if they exist. */
200 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
201 {
202 #ifdef SUPPORT_LINKS
203         if (link_stat(path, stp, copy_dirlinks) < 0)
204                 return -1;
205         if (S_ISLNK(stp->st_mode)) {
206                 int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
207                 if (llen < 0)
208                         return -1;
209                 linkbuf[llen] = '\0';
210                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
211                         if (INFO_GTE(SYMSAFE, 1)) {
212                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
213                                         path, linkbuf);
214                         }
215                         return x_stat(path, stp, NULL);
216                 }
217                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
218                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
219                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
220                                 llen - SYMLINK_PREFIX_LEN + 1);
221                 }
222         }
223         return 0;
224 #else
225         return x_stat(path, stp, NULL);
226 #endif
227 }
228
229 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
230 {
231 #ifdef SUPPORT_LINKS
232         if (copy_links)
233                 return x_stat(path, stp, NULL);
234         if (x_lstat(path, stp, NULL) < 0)
235                 return -1;
236         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
237                 STRUCT_STAT st;
238                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
239                         *stp = st;
240         }
241         return 0;
242 #else
243         return x_stat(path, stp, NULL);
244 #endif
245 }
246
247 static inline int is_daemon_excluded(const char *fname, int is_dir)
248 {
249         if (daemon_filter_list.head
250          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
251                 errno = ENOENT;
252                 return 1;
253         }
254         return 0;
255 }
256
257 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
258 {
259         if (daemon_filter_list.head) {
260                 char *slash = path;
261
262                 while ((slash = strchr(slash+1, '/')) != NULL) {
263                         int ret;
264                         *slash = '\0';
265                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
266                         *slash = '/';
267                         if (ret < 0) {
268                                 errno = ENOENT;
269                                 return 1;
270                         }
271                 }
272
273                 if (!ignore_filename
274                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
275                         errno = ENOENT;
276                         return 1;
277                 }
278         }
279
280         return 0;
281 }
282
283 /* This function is used to check if a file should be included/excluded
284  * from the list of files based on its name and type etc.  The value of
285  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
286 static int is_excluded(const char *fname, int is_dir, int filter_level)
287 {
288 #if 0 /* This currently never happens, so avoid a useless compare. */
289         if (filter_level == NO_FILTERS)
290                 return 0;
291 #endif
292         if (is_daemon_excluded(fname, is_dir))
293                 return 1;
294         if (filter_level != ALL_FILTERS)
295                 return 0;
296         if (filter_list.head
297             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
298                 return 1;
299         return 0;
300 }
301
302 static void send_directory(int f, struct file_list *flist,
303                            char *fbuf, int len, int flags);
304
305 static const char *pathname, *orig_dir;
306 static int pathname_len;
307
308 /* Make sure flist can hold at least flist->used + extra entries. */
309 static void flist_expand(struct file_list *flist, int extra)
310 {
311         struct file_struct **new_ptr;
312
313         if (flist->used + extra <= flist->malloced)
314                 return;
315
316         if (flist->malloced < FLIST_START)
317                 flist->malloced = FLIST_START;
318         else if (flist->malloced >= FLIST_LINEAR)
319                 flist->malloced += FLIST_LINEAR;
320         else
321                 flist->malloced *= 2;
322
323         /* In case count jumped or we are starting the list
324          * with a known size just set it. */
325         if (flist->malloced < flist->used + extra)
326                 flist->malloced = flist->used + extra;
327
328         new_ptr = realloc_array(flist->files, struct file_struct *,
329                                 flist->malloced);
330
331         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
332                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
333                     who_am_i(),
334                     big_num(sizeof flist->files[0] * flist->malloced),
335                     (new_ptr == flist->files) ? " not" : "");
336         }
337
338         flist->files = new_ptr;
339
340         if (!flist->files)
341                 out_of_memory("flist_expand");
342 }
343
344 static void flist_done_allocating(struct file_list *flist)
345 {
346         void *ptr = pool_boundary(flist->file_pool, 8*1024);
347         if (flist->pool_boundary == ptr)
348                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
349         else
350                 flist->pool_boundary = ptr;
351 }
352
353 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
354  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
355  * with dir == NULL taken to be the starting directory, and dirlen < 0
356  * indicating that strdup(dir) should be called and then the -dirlen length
357  * value checked to ensure that it is not daemon-excluded. */
358 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
359 {
360         if (dirlen < 0) {
361                 char *cpy = strdup(dir);
362                 if (*cpy != '/')
363                         change_dir(orig_dir, CD_SKIP_CHDIR);
364                 if (path_is_daemon_excluded(cpy, 0))
365                         goto chdir_error;
366                 dir = cpy;
367                 dirlen = -dirlen;
368         } else {
369                 if (file) {
370                         if (pathname == F_PATHNAME(file))
371                                 return 1;
372                         dir = F_PATHNAME(file);
373                         if (dir)
374                                 dirlen = strlen(dir);
375                 } else if (pathname == dir)
376                         return 1;
377                 if (dir && *dir != '/')
378                         change_dir(orig_dir, CD_SKIP_CHDIR);
379         }
380
381         pathname = dir;
382         pathname_len = dirlen;
383
384         if (!dir)
385                 dir = orig_dir;
386
387         if (!change_dir(dir, CD_NORMAL)) {
388           chdir_error:
389                 io_error |= IOERR_GENERAL;
390                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
391                 if (dir != orig_dir)
392                         change_dir(orig_dir, CD_NORMAL);
393                 pathname = NULL;
394                 pathname_len = 0;
395                 return 0;
396         }
397
398         return 1;
399 }
400
401 static void send_file_entry(int f, const char *fname, struct file_struct *file,
402 #ifdef SUPPORT_LINKS
403                             const char *symlink_name, int symlink_len,
404 #endif
405                             int ndx, int first_ndx)
406 {
407         static time_t modtime;
408         static mode_t mode;
409 #ifdef SUPPORT_HARD_LINKS
410         static int64 dev;
411 #endif
412         static dev_t rdev;
413         static uint32 rdev_major;
414         static uid_t uid;
415         static gid_t gid;
416         static const char *user_name, *group_name;
417         static char lastname[MAXPATHLEN];
418 #ifdef SUPPORT_HARD_LINKS
419         int first_hlink_ndx = -1;
420 #endif
421         int l1, l2;
422         int xflags;
423
424         /* Initialize starting value of xflags and adjust counts. */
425         if (S_ISREG(file->mode))
426                 xflags = 0;
427         else if (S_ISDIR(file->mode)) {
428                 stats.num_dirs++;
429                 if (protocol_version >= 30) {
430                         if (file->flags & FLAG_CONTENT_DIR)
431                                 xflags = file->flags & FLAG_TOP_DIR;
432                         else if (file->flags & FLAG_IMPLIED_DIR)
433                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
434                         else
435                                 xflags = XMIT_NO_CONTENT_DIR;
436                 } else
437                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
438         } else {
439                 if (S_ISLNK(file->mode))
440                         stats.num_symlinks++;
441                 else if (IS_DEVICE(file->mode))
442                         stats.num_devices++;
443                 else if (IS_SPECIAL(file->mode))
444                         stats.num_specials++;
445                 xflags = 0;
446         }
447
448         if (file->mode == mode)
449                 xflags |= XMIT_SAME_MODE;
450         else
451                 mode = file->mode;
452
453         if (preserve_devices && IS_DEVICE(mode)) {
454                 if (protocol_version < 28) {
455                         if (tmp_rdev == rdev)
456                                 xflags |= XMIT_SAME_RDEV_pre28;
457                         else
458                                 rdev = tmp_rdev;
459                 } else {
460                         rdev = tmp_rdev;
461                         if ((uint32)major(rdev) == rdev_major)
462                                 xflags |= XMIT_SAME_RDEV_MAJOR;
463                         else
464                                 rdev_major = major(rdev);
465                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
466                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
467                 }
468         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
469                 /* Special files don't need an rdev number, so just make
470                  * the historical transmission of the value efficient. */
471                 if (protocol_version < 28)
472                         xflags |= XMIT_SAME_RDEV_pre28;
473                 else {
474                         rdev = MAKEDEV(major(rdev), 0);
475                         xflags |= XMIT_SAME_RDEV_MAJOR;
476                         if (protocol_version < 30)
477                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
478                 }
479         } else if (protocol_version < 28)
480                 rdev = MAKEDEV(0, 0);
481         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
482                 xflags |= XMIT_SAME_UID;
483         else {
484                 uid = F_OWNER(file);
485                 if (!numeric_ids) {
486                         user_name = add_uid(uid);
487                         if (inc_recurse && user_name)
488                                 xflags |= XMIT_USER_NAME_FOLLOWS;
489                 }
490         }
491         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
492                 xflags |= XMIT_SAME_GID;
493         else {
494                 gid = F_GROUP(file);
495                 if (!numeric_ids) {
496                         group_name = add_gid(gid);
497                         if (inc_recurse && group_name)
498                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
499                 }
500         }
501         if (file->modtime == modtime)
502                 xflags |= XMIT_SAME_TIME;
503         else
504                 modtime = file->modtime;
505         if (NSEC_BUMP(file) && protocol_version >= 31)
506                 xflags |= XMIT_MOD_NSEC;
507
508 #ifdef SUPPORT_HARD_LINKS
509         if (tmp_dev != -1) {
510                 if (protocol_version >= 30) {
511                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
512                         first_hlink_ndx = (int32)(long)np->data - 1;
513                         if (first_hlink_ndx < 0) {
514                                 np->data = (void*)(long)(first_ndx + ndx + 1);
515                                 xflags |= XMIT_HLINK_FIRST;
516                         }
517                         if (DEBUG_GTE(HLINK, 1)) {
518                                 if (first_hlink_ndx >= 0) {
519                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
520                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
521                                                 first_hlink_ndx >= first_ndx ? "" : "un");
522                                 } else if (DEBUG_GTE(HLINK, 3)) {
523                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
524                                                 who_am_i(), first_ndx + ndx,
525                                                 big_num(tmp_dev), big_num(tmp_ino));
526                                 }
527                         }
528                 } else {
529                         if (tmp_dev == dev) {
530                                 if (protocol_version >= 28)
531                                         xflags |= XMIT_SAME_DEV_pre30;
532                         } else
533                                 dev = tmp_dev;
534                 }
535                 xflags |= XMIT_HLINKED;
536         }
537 #endif
538
539         for (l1 = 0;
540             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
541             l1++) {}
542         l2 = strlen(fname+l1);
543
544         if (l1 > 0)
545                 xflags |= XMIT_SAME_NAME;
546         if (l2 > 255)
547                 xflags |= XMIT_LONG_NAME;
548
549         /* We must make sure we don't send a zero flag byte or the
550          * other end will terminate the flist transfer.  Note that
551          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
552          * it's harmless way to add a bit to the first flag byte. */
553         if (protocol_version >= 28) {
554                 if (!xflags && !S_ISDIR(mode))
555                         xflags |= XMIT_TOP_DIR;
556                 if ((xflags & 0xFF00) || !xflags) {
557                         xflags |= XMIT_EXTENDED_FLAGS;
558                         write_shortint(f, xflags);
559                 } else
560                         write_byte(f, xflags);
561         } else {
562                 if (!(xflags & 0xFF))
563                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
564                 write_byte(f, xflags);
565         }
566         if (xflags & XMIT_SAME_NAME)
567                 write_byte(f, l1);
568         if (xflags & XMIT_LONG_NAME)
569                 write_varint30(f, l2);
570         else
571                 write_byte(f, l2);
572         write_buf(f, fname + l1, l2);
573
574 #ifdef SUPPORT_HARD_LINKS
575         if (first_hlink_ndx >= 0) {
576                 write_varint(f, first_hlink_ndx);
577                 if (first_hlink_ndx >= first_ndx)
578                         goto the_end;
579         }
580 #endif
581
582         write_varlong30(f, F_LENGTH(file), 3);
583         if (!(xflags & XMIT_SAME_TIME)) {
584                 if (protocol_version >= 30)
585                         write_varlong(f, modtime, 4);
586                 else
587                         write_int(f, modtime);
588         }
589         if (xflags & XMIT_MOD_NSEC)
590                 write_varint(f, F_MOD_NSEC(file));
591         if (!(xflags & XMIT_SAME_MODE))
592                 write_int(f, to_wire_mode(mode));
593         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
594                 if (protocol_version < 30)
595                         write_int(f, uid);
596                 else {
597                         write_varint(f, uid);
598                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
599                                 int len = strlen(user_name);
600                                 write_byte(f, len);
601                                 write_buf(f, user_name, len);
602                         }
603                 }
604         }
605         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
606                 if (protocol_version < 30)
607                         write_int(f, gid);
608                 else {
609                         write_varint(f, gid);
610                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
611                                 int len = strlen(group_name);
612                                 write_byte(f, len);
613                                 write_buf(f, group_name, len);
614                         }
615                 }
616         }
617         if ((preserve_devices && IS_DEVICE(mode))
618          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
619                 if (protocol_version < 28) {
620                         if (!(xflags & XMIT_SAME_RDEV_pre28))
621                                 write_int(f, (int)rdev);
622                 } else {
623                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
624                                 write_varint30(f, major(rdev));
625                         if (protocol_version >= 30)
626                                 write_varint(f, minor(rdev));
627                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
628                                 write_byte(f, minor(rdev));
629                         else
630                                 write_int(f, minor(rdev));
631                 }
632         }
633
634 #ifdef SUPPORT_LINKS
635         if (symlink_len) {
636                 write_varint30(f, symlink_len);
637                 write_buf(f, symlink_name, symlink_len);
638         }
639 #endif
640
641 #ifdef SUPPORT_HARD_LINKS
642         if (tmp_dev != -1 && protocol_version < 30) {
643                 /* Older protocols expect the dev number to be transmitted
644                  * 1-incremented so that it is never zero. */
645                 if (protocol_version < 26) {
646                         /* 32-bit dev_t and ino_t */
647                         write_int(f, (int32)(dev+1));
648                         write_int(f, (int32)tmp_ino);
649                 } else {
650                         /* 64-bit dev_t and ino_t */
651                         if (!(xflags & XMIT_SAME_DEV_pre30))
652                                 write_longint(f, dev+1);
653                         write_longint(f, tmp_ino);
654                 }
655         }
656 #endif
657
658         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
659                 const char *sum;
660                 if (S_ISREG(mode))
661                         sum = tmp_sum;
662                 else {
663                         /* Prior to 28, we sent a useless set of nulls. */
664                         sum = empty_sum;
665                 }
666                 write_buf(f, sum, checksum_len);
667         }
668
669 #ifdef SUPPORT_HARD_LINKS
670   the_end:
671 #endif
672         strlcpy(lastname, fname, MAXPATHLEN);
673
674         if (S_ISREG(mode) || S_ISLNK(mode))
675                 stats.total_size += F_LENGTH(file);
676 }
677
678 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
679 {
680         static int64 modtime;
681         static mode_t mode;
682 #ifdef SUPPORT_HARD_LINKS
683         static int64 dev;
684 #endif
685         static dev_t rdev;
686         static uint32 rdev_major;
687         static uid_t uid;
688         static gid_t gid;
689         static uint16 gid_flags;
690         static char lastname[MAXPATHLEN], *lastdir;
691         static int lastdir_depth, lastdir_len = -1;
692         static unsigned int del_hier_name_len = 0;
693         static int in_del_hier = 0;
694         char thisname[MAXPATHLEN];
695         unsigned int l1 = 0, l2 = 0;
696         int alloc_len, basename_len, linkname_len;
697         int extra_len = file_extra_cnt * EXTRA_LEN;
698         int first_hlink_ndx = -1;
699         int64 file_length;
700         uint32 modtime_nsec;
701         const char *basename;
702         struct file_struct *file;
703         alloc_pool_t *pool;
704         char *bp;
705
706         if (xflags & XMIT_SAME_NAME)
707                 l1 = read_byte(f);
708
709         if (xflags & XMIT_LONG_NAME)
710                 l2 = read_varint30(f);
711         else
712                 l2 = read_byte(f);
713
714         if (l2 >= MAXPATHLEN - l1) {
715                 rprintf(FERROR,
716                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
717                         xflags, l1, l2, lastname, who_am_i());
718                 overflow_exit("recv_file_entry");
719         }
720
721         strlcpy(thisname, lastname, l1 + 1);
722         read_sbuf(f, &thisname[l1], l2);
723         thisname[l1 + l2] = 0;
724
725         /* Abuse basename_len for a moment... */
726         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
727
728 #ifdef ICONV_OPTION
729         if (ic_recv != (iconv_t)-1) {
730                 xbuf outbuf, inbuf;
731
732                 INIT_CONST_XBUF(outbuf, thisname);
733                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
734
735                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
736                         io_error |= IOERR_GENERAL;
737                         rprintf(FERROR_UTF8,
738                             "[%s] cannot convert filename: %s (%s)\n",
739                             who_am_i(), lastname, strerror(errno));
740                         outbuf.len = 0;
741                 }
742                 thisname[outbuf.len] = '\0';
743         }
744 #endif
745
746         if (*thisname)
747                 clean_fname(thisname, 0);
748
749         if (sanitize_paths)
750                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
751
752         if ((basename = strrchr(thisname, '/')) != NULL) {
753                 int len = basename++ - thisname;
754                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
755                         lastdir = new_array(char, len + 1);
756                         memcpy(lastdir, thisname, len);
757                         lastdir[len] = '\0';
758                         lastdir_len = len;
759                         lastdir_depth = count_dir_elements(lastdir);
760                 }
761         } else
762                 basename = thisname;
763         basename_len = strlen(basename) + 1; /* count the '\0' */
764
765 #ifdef SUPPORT_HARD_LINKS
766         if (protocol_version >= 30
767          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
768                 first_hlink_ndx = read_varint(f);
769                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
770                         rprintf(FERROR,
771                                 "hard-link reference out of range: %d (%d)\n",
772                                 first_hlink_ndx, flist->ndx_start + flist->used);
773                         exit_cleanup(RERR_PROTOCOL);
774                 }
775                 if (DEBUG_GTE(HLINK, 1)) {
776                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
777                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
778                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
779                 }
780                 if (first_hlink_ndx >= flist->ndx_start) {
781                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
782                         file_length = F_LENGTH(first);
783                         modtime = first->modtime;
784                         modtime_nsec = F_MOD_NSEC(first);
785                         mode = first->mode;
786                         if (preserve_uid)
787                                 uid = F_OWNER(first);
788                         if (preserve_gid)
789                                 gid = F_GROUP(first);
790                         if (preserve_devices && IS_DEVICE(mode)) {
791                                 uint32 *devp = F_RDEV_P(first);
792                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
793                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
794                         }
795                         if (preserve_links && S_ISLNK(mode))
796                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
797                         else
798                                 linkname_len = 0;
799                         goto create_object;
800                 }
801         }
802 #endif
803
804         file_length = read_varlong30(f, 3);
805         if (!(xflags & XMIT_SAME_TIME)) {
806                 if (protocol_version >= 30) {
807                         modtime = read_varlong(f, 4);
808 #if SIZEOF_TIME_T < SIZEOF_INT64
809                         if (!am_generator && (int64)(time_t)modtime != modtime) {
810                                 rprintf(FERROR_XFER,
811                                     "Time value of %s truncated on receiver.\n",
812                                     lastname);
813                         }
814 #endif
815                 } else
816                         modtime = read_int(f);
817         }
818         if (xflags & XMIT_MOD_NSEC)
819                 modtime_nsec = read_varint(f);
820         else
821                 modtime_nsec = 0;
822         if (!(xflags & XMIT_SAME_MODE))
823                 mode = from_wire_mode(read_int(f));
824
825         if (chmod_modes && !S_ISLNK(mode) && mode)
826                 mode = tweak_mode(mode, chmod_modes);
827
828         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
829                 if (protocol_version < 30)
830                         uid = (uid_t)read_int(f);
831                 else {
832                         uid = (uid_t)read_varint(f);
833                         if (xflags & XMIT_USER_NAME_FOLLOWS)
834                                 uid = recv_user_name(f, uid);
835                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
836                                 uid = match_uid(uid);
837                 }
838         }
839         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
840                 if (protocol_version < 30)
841                         gid = (gid_t)read_int(f);
842                 else {
843                         gid = (gid_t)read_varint(f);
844                         gid_flags = 0;
845                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
846                                 gid = recv_group_name(f, gid, &gid_flags);
847                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
848                                 gid = match_gid(gid, &gid_flags);
849                 }
850         }
851
852         if ((preserve_devices && IS_DEVICE(mode))
853          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
854                 if (protocol_version < 28) {
855                         if (!(xflags & XMIT_SAME_RDEV_pre28))
856                                 rdev = (dev_t)read_int(f);
857                 } else {
858                         uint32 rdev_minor;
859                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
860                                 rdev_major = read_varint30(f);
861                         if (protocol_version >= 30)
862                                 rdev_minor = read_varint(f);
863                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
864                                 rdev_minor = read_byte(f);
865                         else
866                                 rdev_minor = read_int(f);
867                         rdev = MAKEDEV(rdev_major, rdev_minor);
868                 }
869                 if (IS_DEVICE(mode))
870                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
871                 file_length = 0;
872         } else if (protocol_version < 28)
873                 rdev = MAKEDEV(0, 0);
874
875 #ifdef SUPPORT_LINKS
876         if (preserve_links && S_ISLNK(mode)) {
877                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
878                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
879                         rprintf(FERROR, "overflow: linkname_len=%d\n",
880                                 linkname_len - 1);
881                         overflow_exit("recv_file_entry");
882                 }
883 #ifdef ICONV_OPTION
884                 /* We don't know how much extra room we need to convert
885                  * the as-yet-unread symlink data, so let's hope that a
886                  * double-size buffer is plenty. */
887                 if (sender_symlink_iconv)
888                         linkname_len *= 2;
889 #endif
890                 if (munge_symlinks)
891                         linkname_len += SYMLINK_PREFIX_LEN;
892         }
893         else
894 #endif
895                 linkname_len = 0;
896
897 #ifdef SUPPORT_HARD_LINKS
898   create_object:
899         if (preserve_hard_links) {
900                 if (protocol_version < 28 && S_ISREG(mode))
901                         xflags |= XMIT_HLINKED;
902                 if (xflags & XMIT_HLINKED)
903                         extra_len += (inc_recurse+1) * EXTRA_LEN;
904         }
905 #endif
906
907 #ifdef SUPPORT_ACLS
908         /* Directories need an extra int32 for the default ACL. */
909         if (preserve_acls && S_ISDIR(mode))
910                 extra_len += EXTRA_LEN;
911 #endif
912
913         if (always_checksum && S_ISREG(mode))
914                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
915
916 #if SIZEOF_INT64 >= 8
917         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
918                 extra_len += EXTRA_LEN;
919 #endif
920 #ifdef HAVE_UTIMENSAT
921         if (modtime_nsec)
922                 extra_len += EXTRA_LEN;
923 #endif
924         if (file_length < 0) {
925                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
926                 exit_cleanup(RERR_UNSUPPORTED);
927         }
928
929         if (inc_recurse && S_ISDIR(mode)) {
930                 if (one_file_system) {
931                         /* Room to save the dir's device for -x */
932                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
933                 }
934                 pool = dir_flist->file_pool;
935         } else
936                 pool = flist->file_pool;
937
938 #if EXTRA_ROUNDING > 0
939         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
940                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
941 #endif
942
943         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
944                   + linkname_len;
945         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
946
947         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
948         bp += extra_len;
949         file = (struct file_struct *)bp;
950         bp += FILE_STRUCT_LEN;
951
952         memcpy(bp, basename, basename_len);
953
954 #ifdef SUPPORT_HARD_LINKS
955         if (xflags & XMIT_HLINKED)
956                 file->flags |= FLAG_HLINKED;
957 #endif
958         file->modtime = (time_t)modtime;
959 #ifdef HAVE_UTIMENSAT
960         if (modtime_nsec) {
961                 file->flags |= FLAG_MOD_NSEC;
962                 OPT_EXTRA(file, 0)->unum = modtime_nsec;
963         }
964 #endif
965         file->len32 = (uint32)file_length;
966 #if SIZEOF_INT64 >= 8
967         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
968 #if SIZEOF_CAPITAL_OFF_T < 8
969                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
970                 exit_cleanup(RERR_UNSUPPORTED);
971 #else
972                 file->flags |= FLAG_LENGTH64;
973                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(file_length >> 32);
974 #endif
975         }
976 #endif
977         file->mode = mode;
978         if (preserve_uid)
979                 F_OWNER(file) = uid;
980         if (preserve_gid) {
981                 F_GROUP(file) = gid;
982                 file->flags |= gid_flags;
983         }
984         if (unsort_ndx)
985                 F_NDX(file) = flist->used + flist->ndx_start;
986
987         if (basename != thisname) {
988                 file->dirname = lastdir;
989                 F_DEPTH(file) = lastdir_depth + 1;
990         } else
991                 F_DEPTH(file) = 1;
992
993         if (S_ISDIR(mode)) {
994                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
995                         F_DEPTH(file)--;
996                 if (protocol_version >= 30) {
997                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
998                                 if (xflags & XMIT_TOP_DIR)
999                                         file->flags |= FLAG_TOP_DIR;
1000                                 file->flags |= FLAG_CONTENT_DIR;
1001                         } else if (xflags & XMIT_TOP_DIR)
1002                                 file->flags |= FLAG_IMPLIED_DIR;
1003                 } else if (xflags & XMIT_TOP_DIR) {
1004                         in_del_hier = recurse;
1005                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
1006                         if (relative_paths && del_hier_name_len > 2
1007                             && lastname[del_hier_name_len-1] == '.'
1008                             && lastname[del_hier_name_len-2] == '/')
1009                                 del_hier_name_len -= 2;
1010                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
1011                 } else if (in_del_hier) {
1012                         if (!relative_paths || !del_hier_name_len
1013                          || (l1 >= del_hier_name_len
1014                           && lastname[del_hier_name_len] == '/'))
1015                                 file->flags |= FLAG_CONTENT_DIR;
1016                         else
1017                                 in_del_hier = 0;
1018                 }
1019         }
1020
1021         if (preserve_devices && IS_DEVICE(mode)) {
1022                 uint32 *devp = F_RDEV_P(file);
1023                 DEV_MAJOR(devp) = major(rdev);
1024                 DEV_MINOR(devp) = minor(rdev);
1025         }
1026
1027 #ifdef SUPPORT_LINKS
1028         if (linkname_len) {
1029                 bp += basename_len;
1030                 if (first_hlink_ndx >= flist->ndx_start) {
1031                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1032                         memcpy(bp, F_SYMLINK(first), linkname_len);
1033                 } else {
1034                         if (munge_symlinks) {
1035                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1036                                 bp += SYMLINK_PREFIX_LEN;
1037                                 linkname_len -= SYMLINK_PREFIX_LEN;
1038                         }
1039 #ifdef ICONV_OPTION
1040                         if (sender_symlink_iconv) {
1041                                 xbuf outbuf, inbuf;
1042
1043                                 alloc_len = linkname_len;
1044                                 linkname_len /= 2;
1045
1046                                 /* Read the symlink data into the end of our double-sized
1047                                  * buffer and then convert it into the right spot. */
1048                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1049                                           linkname_len - 1, (size_t)-1);
1050                                 read_sbuf(f, inbuf.buf, inbuf.len);
1051                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1052
1053                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
1054                                         io_error |= IOERR_GENERAL;
1055                                         rprintf(FERROR_XFER,
1056                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1057                                             who_am_i(), full_fname(thisname), strerror(errno));
1058                                         bp = (char*)file->basename;
1059                                         *bp++ = '\0';
1060                                         outbuf.len = 0;
1061                                 }
1062                                 bp[outbuf.len] = '\0';
1063                         } else
1064 #endif
1065                                 read_sbuf(f, bp, linkname_len - 1);
1066                         if (sanitize_paths && !munge_symlinks && *bp)
1067                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1068                 }
1069         }
1070 #endif
1071
1072 #ifdef SUPPORT_HARD_LINKS
1073         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1074                 if (protocol_version >= 30) {
1075                         if (xflags & XMIT_HLINK_FIRST) {
1076                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1077                         } else
1078                                 F_HL_GNUM(file) = first_hlink_ndx;
1079                 } else {
1080                         static int32 cnt = 0;
1081                         struct ht_int64_node *np;
1082                         int64 ino;
1083                         int32 ndx;
1084                         if (protocol_version < 26) {
1085                                 dev = read_int(f);
1086                                 ino = read_int(f);
1087                         } else {
1088                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1089                                         dev = read_longint(f);
1090                                 ino = read_longint(f);
1091                         }
1092                         np = idev_find(dev, ino);
1093                         ndx = (int32)(long)np->data - 1;
1094                         if (ndx < 0) {
1095                                 ndx = cnt++;
1096                                 np->data = (void*)(long)cnt;
1097                         }
1098                         F_HL_GNUM(file) = ndx;
1099                 }
1100         }
1101 #endif
1102
1103         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1104                 if (S_ISREG(mode))
1105                         bp = F_SUM(file);
1106                 else {
1107                         /* Prior to 28, we get a useless set of nulls. */
1108                         bp = tmp_sum;
1109                 }
1110                 if (first_hlink_ndx >= flist->ndx_start) {
1111                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1112                         memcpy(bp, F_SUM(first), checksum_len);
1113                 } else
1114                         read_buf(f, bp, checksum_len);
1115         }
1116
1117 #ifdef SUPPORT_ACLS
1118         if (preserve_acls && !S_ISLNK(mode))
1119                 receive_acl(f, file);
1120 #endif
1121 #ifdef SUPPORT_XATTRS
1122         if (preserve_xattrs)
1123                 receive_xattr(f, file);
1124 #endif
1125
1126         if (S_ISREG(mode) || S_ISLNK(mode))
1127                 stats.total_size += file_length;
1128
1129         return file;
1130 }
1131
1132 /* Create a file_struct for a named file by reading its stat() information
1133  * and performing extensive checks against global options.
1134  *
1135  * Returns a pointer to the new file struct, or NULL if there was an error
1136  * or this file should be excluded.
1137  *
1138  * Note: Any error (here or in send_file_name) that results in the omission of
1139  * an existent source file from the file list should set
1140  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1141  * destination if --delete is on. */
1142 struct file_struct *make_file(const char *fname, struct file_list *flist,
1143                               STRUCT_STAT *stp, int flags, int filter_level)
1144 {
1145         static char *lastdir;
1146         static int lastdir_len = -1;
1147         struct file_struct *file;
1148         char thisname[MAXPATHLEN];
1149         char linkname[MAXPATHLEN];
1150         int alloc_len, basename_len, linkname_len;
1151         int extra_len = file_extra_cnt * EXTRA_LEN;
1152         const char *basename;
1153         alloc_pool_t *pool;
1154         STRUCT_STAT st;
1155         char *bp;
1156
1157         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1158                 io_error |= IOERR_GENERAL;
1159                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1160                 return NULL;
1161         }
1162         clean_fname(thisname, 0);
1163         if (sanitize_paths)
1164                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1165
1166         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1167                 /* This is needed to handle a "symlink/." with a --relative
1168                  * dir, or a request to delete a specific file. */
1169                 st = *stp;
1170                 *linkname = '\0'; /* make IBM code checker happy */
1171         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1172                 int save_errno = errno;
1173                 /* See if file is excluded before reporting an error. */
1174                 if (filter_level != NO_FILTERS
1175                  && (is_excluded(thisname, 0, filter_level)
1176                   || is_excluded(thisname, 1, filter_level))) {
1177                         if (ignore_perishable && save_errno != ENOENT)
1178                                 non_perishable_cnt++;
1179                         return NULL;
1180                 }
1181                 if (save_errno == ENOENT) {
1182 #ifdef SUPPORT_LINKS
1183                         /* When our options tell us to follow a symlink that
1184                          * points nowhere, tell the user about the symlink
1185                          * instead of giving a "vanished" message.  We only
1186                          * dereference a symlink if one of the --copy*links
1187                          * options was specified, so there's no need for the
1188                          * extra lstat() if one of these options isn't on. */
1189                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1190                          && x_lstat(thisname, &st, NULL) == 0
1191                          && S_ISLNK(st.st_mode)) {
1192                                 io_error |= IOERR_GENERAL;
1193                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1194                                         full_fname(thisname));
1195                         } else
1196 #endif
1197                         {
1198                                 enum logcode c = am_daemon && protocol_version < 28
1199                                                ? FERROR : FWARNING;
1200                                 io_error |= IOERR_VANISHED;
1201                                 rprintf(c, "file has vanished: %s\n",
1202                                         full_fname(thisname));
1203                         }
1204                 } else {
1205                         io_error |= IOERR_GENERAL;
1206                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1207                                 full_fname(thisname));
1208                 }
1209                 return NULL;
1210         } else if (st.st_mode == 0) {
1211                 io_error |= IOERR_GENERAL;
1212                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1213                         full_fname(thisname));
1214                 return NULL;
1215         }
1216
1217         if (filter_level == NO_FILTERS)
1218                 goto skip_filters;
1219
1220         if (S_ISDIR(st.st_mode)) {
1221                 if (!xfer_dirs) {
1222                         rprintf(FINFO, "skipping directory %s\n", thisname);
1223                         return NULL;
1224                 }
1225                 /* -x only affects dirs because we need to avoid recursing
1226                  * into a mount-point directory, not to avoid copying a
1227                  * symlinked file if -L (or similar) was specified. */
1228                 if (one_file_system && st.st_dev != filesystem_dev
1229                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1230                         if (one_file_system > 1) {
1231                                 if (INFO_GTE(MOUNT, 1)) {
1232                                         rprintf(FINFO,
1233                                             "[%s] skipping mount-point dir %s\n",
1234                                             who_am_i(), thisname);
1235                                 }
1236                                 return NULL;
1237                         }
1238                         flags |= FLAG_MOUNT_DIR;
1239                         flags &= ~FLAG_CONTENT_DIR;
1240                 }
1241         } else
1242                 flags &= ~FLAG_CONTENT_DIR;
1243
1244         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1245                 if (ignore_perishable)
1246                         non_perishable_cnt++;
1247                 return NULL;
1248         }
1249
1250         if (lp_ignore_nonreadable(module_id)) {
1251 #ifdef SUPPORT_LINKS
1252                 if (!S_ISLNK(st.st_mode))
1253 #endif
1254                         if (access(thisname, R_OK) != 0)
1255                                 return NULL;
1256         }
1257
1258   skip_filters:
1259
1260         /* Only divert a directory in the main transfer. */
1261         if (flist) {
1262                 if (flist->prev && S_ISDIR(st.st_mode)
1263                  && flags & FLAG_DIVERT_DIRS) {
1264                         /* Room for parent/sibling/next-child info. */
1265                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1266                         if (relative_paths)
1267                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1268                         pool = dir_flist->file_pool;
1269                 } else
1270                         pool = flist->file_pool;
1271         } else {
1272 #ifdef SUPPORT_ACLS
1273                 /* Directories need an extra int32 for the default ACL. */
1274                 if (preserve_acls && S_ISDIR(st.st_mode))
1275                         extra_len += EXTRA_LEN;
1276 #endif
1277                 pool = NULL;
1278         }
1279
1280         if (DEBUG_GTE(FLIST, 2)) {
1281                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1282                         who_am_i(), thisname, filter_level);
1283         }
1284
1285         if ((basename = strrchr(thisname, '/')) != NULL) {
1286                 int len = basename++ - thisname;
1287                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1288                         lastdir = new_array(char, len + 1);
1289                         memcpy(lastdir, thisname, len);
1290                         lastdir[len] = '\0';
1291                         lastdir_len = len;
1292                 }
1293         } else
1294                 basename = thisname;
1295         basename_len = strlen(basename) + 1; /* count the '\0' */
1296
1297 #ifdef SUPPORT_LINKS
1298         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1299 #else
1300         linkname_len = 0;
1301 #endif
1302
1303 #ifdef ST_MTIME_NSEC
1304         if (st.ST_MTIME_NSEC && protocol_version >= 31)
1305                 extra_len += EXTRA_LEN;
1306 #endif
1307 #if SIZEOF_CAPITAL_OFF_T >= 8
1308         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1309                 extra_len += EXTRA_LEN;
1310 #endif
1311
1312         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1313                 file_checksum(thisname, tmp_sum, st.st_size);
1314                 if (sender_keeps_checksum)
1315                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1316         }
1317
1318 #if EXTRA_ROUNDING > 0
1319         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1320                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1321 #endif
1322
1323         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1324                   + linkname_len;
1325         if (pool)
1326                 bp = pool_alloc(pool, alloc_len, "make_file");
1327         else {
1328                 if (!(bp = new_array(char, alloc_len)))
1329                         out_of_memory("make_file");
1330         }
1331
1332         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1333         bp += extra_len;
1334         file = (struct file_struct *)bp;
1335         bp += FILE_STRUCT_LEN;
1336
1337         memcpy(bp, basename, basename_len);
1338
1339 #ifdef SUPPORT_HARD_LINKS
1340         if (preserve_hard_links && flist && flist->prev) {
1341                 if (protocol_version >= 28
1342                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1343                  : S_ISREG(st.st_mode)) {
1344                         tmp_dev = (int64)st.st_dev;
1345                         tmp_ino = (int64)st.st_ino;
1346                 } else
1347                         tmp_dev = -1;
1348         }
1349 #endif
1350
1351 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1352         if (IS_DEVICE(st.st_mode)) {
1353                 tmp_rdev = st.st_rdev;
1354                 st.st_size = 0;
1355         } else if (IS_SPECIAL(st.st_mode))
1356                 st.st_size = 0;
1357 #endif
1358
1359         file->flags = flags;
1360         file->modtime = st.st_mtime;
1361 #ifdef ST_MTIME_NSEC
1362         if (st.ST_MTIME_NSEC && protocol_version >= 31) {
1363                 file->flags |= FLAG_MOD_NSEC;
1364                 OPT_EXTRA(file, 0)->unum = st.ST_MTIME_NSEC;
1365         }
1366 #endif
1367         file->len32 = (uint32)st.st_size;
1368 #if SIZEOF_CAPITAL_OFF_T >= 8
1369         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1370                 file->flags |= FLAG_LENGTH64;
1371                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(st.st_size >> 32);
1372         }
1373 #endif
1374         file->mode = st.st_mode;
1375         if (preserve_uid)
1376                 F_OWNER(file) = st.st_uid;
1377         if (preserve_gid)
1378                 F_GROUP(file) = st.st_gid;
1379         if (am_generator && st.st_uid == our_uid)
1380                 file->flags |= FLAG_OWNED_BY_US;
1381
1382         if (basename != thisname)
1383                 file->dirname = lastdir;
1384
1385 #ifdef SUPPORT_LINKS
1386         if (linkname_len)
1387                 memcpy(bp + basename_len, linkname, linkname_len);
1388 #endif
1389
1390         if (am_sender)
1391                 F_PATHNAME(file) = pathname;
1392         else if (!pool)
1393                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1394
1395         if (basename_len == 0+1) {
1396                 if (!pool)
1397                         unmake_file(file);
1398                 return NULL;
1399         }
1400
1401         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1402                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1403
1404         if (unsort_ndx)
1405                 F_NDX(file) = stats.num_dirs;
1406
1407         return file;
1408 }
1409
1410 /* Only called for temporary file_struct entries created by make_file(). */
1411 void unmake_file(struct file_struct *file)
1412 {
1413         free(REQ_EXTRA(file, F_DEPTH(file)));
1414 }
1415
1416 static struct file_struct *send_file_name(int f, struct file_list *flist,
1417                                           const char *fname, STRUCT_STAT *stp,
1418                                           int flags, int filter_level)
1419 {
1420         struct file_struct *file;
1421
1422         file = make_file(fname, flist, stp, flags, filter_level);
1423         if (!file)
1424                 return NULL;
1425
1426         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1427                 file->mode = tweak_mode(file->mode, chmod_modes);
1428
1429         if (f >= 0) {
1430                 char fbuf[MAXPATHLEN];
1431 #ifdef SUPPORT_LINKS
1432                 const char *symlink_name;
1433                 int symlink_len;
1434 #ifdef ICONV_OPTION
1435                 char symlink_buf[MAXPATHLEN];
1436 #endif
1437 #endif
1438 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1439                 stat_x sx;
1440                 init_stat_x(&sx);
1441 #endif
1442
1443 #ifdef SUPPORT_LINKS
1444                 if (preserve_links && S_ISLNK(file->mode)) {
1445                         symlink_name = F_SYMLINK(file);
1446                         symlink_len = strlen(symlink_name);
1447                         if (symlink_len == 0) {
1448                                 io_error |= IOERR_GENERAL;
1449                                 f_name(file, fbuf);
1450                                 rprintf(FERROR_XFER,
1451                                     "skipping symlink with 0-length value: %s\n",
1452                                     full_fname(fbuf));
1453                                 return NULL;
1454                         }
1455                 } else {
1456                         symlink_name = NULL;
1457                         symlink_len = 0;
1458                 }
1459 #endif
1460
1461 #ifdef ICONV_OPTION
1462                 if (ic_send != (iconv_t)-1) {
1463                         xbuf outbuf, inbuf;
1464
1465                         INIT_CONST_XBUF(outbuf, fbuf);
1466
1467                         if (file->dirname) {
1468                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1469                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1470                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0)
1471                                         goto convert_error;
1472                                 outbuf.size += 2;
1473                                 fbuf[outbuf.len++] = '/';
1474                         }
1475
1476                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1477                         if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1478                           convert_error:
1479                                 io_error |= IOERR_GENERAL;
1480                                 rprintf(FERROR_XFER,
1481                                     "[%s] cannot convert filename: %s (%s)\n",
1482                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1483                                 return NULL;
1484                         }
1485                         fbuf[outbuf.len] = '\0';
1486
1487 #ifdef SUPPORT_LINKS
1488                         if (symlink_len && sender_symlink_iconv) {
1489                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1490                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1491                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1492                                         io_error |= IOERR_GENERAL;
1493                                         f_name(file, fbuf);
1494                                         rprintf(FERROR_XFER,
1495                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1496                                             who_am_i(), full_fname(fbuf), strerror(errno));
1497                                         return NULL;
1498                                 }
1499                                 symlink_buf[outbuf.len] = '\0';
1500
1501                                 symlink_name = symlink_buf;
1502                                 symlink_len = outbuf.len;
1503                         }
1504 #endif
1505                 } else
1506 #endif
1507                         f_name(file, fbuf);
1508
1509 #ifdef SUPPORT_ACLS
1510                 if (preserve_acls && !S_ISLNK(file->mode)) {
1511                         sx.st.st_mode = file->mode;
1512                         if (get_acl(fname, &sx) < 0) {
1513                                 io_error |= IOERR_GENERAL;
1514                                 return NULL;
1515                         }
1516                 }
1517 #endif
1518 #ifdef SUPPORT_XATTRS
1519                 if (preserve_xattrs) {
1520                         sx.st.st_mode = file->mode;
1521                         if (get_xattr(fname, &sx) < 0) {
1522                                 io_error |= IOERR_GENERAL;
1523                                 return NULL;
1524                         }
1525                 }
1526 #endif
1527
1528                 send_file_entry(f, fbuf, file,
1529 #ifdef SUPPORT_LINKS
1530                                 symlink_name, symlink_len,
1531 #endif
1532                                 flist->used, flist->ndx_start);
1533
1534 #ifdef SUPPORT_ACLS
1535                 if (preserve_acls && !S_ISLNK(file->mode)) {
1536                         send_acl(f, &sx);
1537                         free_acl(&sx);
1538                 }
1539 #endif
1540 #ifdef SUPPORT_XATTRS
1541                 if (preserve_xattrs) {
1542                         F_XATTR(file) = send_xattr(f, &sx);
1543                         free_xattr(&sx);
1544                 }
1545 #endif
1546         }
1547
1548         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1549
1550         flist_expand(flist, 1);
1551         flist->files[flist->used++] = file;
1552
1553         return file;
1554 }
1555
1556 static void send_if_directory(int f, struct file_list *flist,
1557                               struct file_struct *file,
1558                               char *fbuf, unsigned int ol,
1559                               int flags)
1560 {
1561         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1562
1563         if (S_ISDIR(file->mode)
1564             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1565                 void *save_filters;
1566                 unsigned int len = strlen(fbuf);
1567                 if (len > 1 && fbuf[len-1] == '/')
1568                         fbuf[--len] = '\0';
1569                 save_filters = push_local_filters(fbuf, len);
1570                 send_directory(f, flist, fbuf, len, flags);
1571                 pop_local_filters(save_filters);
1572                 fbuf[ol] = '\0';
1573                 if (is_dot_dir)
1574                         fbuf[ol-1] = '.';
1575         }
1576 }
1577
1578 static int file_compare(const void *file1, const void *file2)
1579 {
1580         return f_name_cmp(*(struct file_struct **)file1,
1581                           *(struct file_struct **)file2);
1582 }
1583
1584 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1585  * version, but I (Wayne) changed the merge code to do less copying and
1586  * to require only half the amount of temporary memory. */
1587 static void fsort_tmp(struct file_struct **fp, size_t num,
1588                       struct file_struct **tmp)
1589 {
1590         struct file_struct **f1, **f2, **t;
1591         size_t n1, n2;
1592
1593         n1 = num / 2;
1594         n2 = num - n1;
1595         f1 = fp;
1596         f2 = fp + n1;
1597
1598         if (n1 > 1)
1599                 fsort_tmp(f1, n1, tmp);
1600         if (n2 > 1)
1601                 fsort_tmp(f2, n2, tmp);
1602
1603         while (f_name_cmp(*f1, *f2) <= 0) {
1604                 if (!--n1)
1605                         return;
1606                 f1++;
1607         }
1608
1609         t = tmp;
1610         memcpy(t, f1, n1 * PTR_SIZE);
1611
1612         *f1++ = *f2++, n2--;
1613
1614         while (n1 > 0 && n2 > 0) {
1615                 if (f_name_cmp(*t, *f2) <= 0)
1616                         *f1++ = *t++, n1--;
1617                 else
1618                         *f1++ = *f2++, n2--;
1619         }
1620
1621         if (n1 > 0)
1622                 memcpy(f1, t, n1 * PTR_SIZE);
1623 }
1624
1625 /* This file-struct sorting routine makes sure that any identical names in
1626  * the file list stay in the same order as they were in the original list.
1627  * This is particularly vital in inc_recurse mode where we expect a sort
1628  * on the flist to match the exact order of a sort on the dir_flist. */
1629 static void fsort(struct file_struct **fp, size_t num)
1630 {
1631         if (num <= 1)
1632                 return;
1633
1634         if (use_qsort)
1635                 qsort(fp, num, PTR_SIZE, file_compare);
1636         else {
1637                 struct file_struct **tmp = new_array(struct file_struct *,
1638                                                      (num+1) / 2);
1639                 fsort_tmp(fp, num, tmp);
1640                 free(tmp);
1641         }
1642 }
1643
1644 /* We take an entire set of sibling dirs from the sorted flist and link them
1645  * into the tree, setting the appropriate parent/child/sibling pointers. */
1646 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1647                              int dir_cnt)
1648 {
1649         int i;
1650         int32 *dp = NULL;
1651         int32 *parent_dp = parent_ndx < 0 ? NULL
1652                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1653
1654         flist_expand(dir_flist, dir_cnt);
1655         dir_flist->sorted = dir_flist->files;
1656
1657         for (i = 0; dir_cnt; i++) {
1658                 struct file_struct *file = from_flist->sorted[i];
1659
1660                 if (!S_ISDIR(file->mode))
1661                         continue;
1662
1663                 dir_flist->files[dir_flist->used++] = file;
1664                 dir_cnt--;
1665
1666                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1667                         continue;
1668
1669                 if (dp)
1670                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1671                 else if (parent_dp)
1672                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1673                 else
1674                         send_dir_ndx = dir_flist->used - 1;
1675
1676                 dp = F_DIR_NODE_P(file);
1677                 DIR_PARENT(dp) = parent_ndx;
1678                 DIR_FIRST_CHILD(dp) = -1;
1679         }
1680         if (dp)
1681                 DIR_NEXT_SIBLING(dp) = -1;
1682 }
1683
1684 static void interpret_stat_error(const char *fname, int is_dir)
1685 {
1686         if (errno == ENOENT) {
1687                 io_error |= IOERR_VANISHED;
1688                 rprintf(FWARNING, "%s has vanished: %s\n",
1689                         is_dir ? "directory" : "file", full_fname(fname));
1690         } else {
1691                 io_error |= IOERR_GENERAL;
1692                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1693                         full_fname(fname));
1694         }
1695 }
1696
1697 /* This function is normally called by the sender, but the receiving side also
1698  * calls it from get_dirlist() with f set to -1 so that we just construct the
1699  * file list in memory without sending it over the wire.  Also, get_dirlist()
1700  * might call this with f set to -2, which also indicates that local filter
1701  * rules should be ignored. */
1702 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1703                            int flags)
1704 {
1705         struct dirent *di;
1706         unsigned remainder;
1707         char *p;
1708         DIR *d;
1709         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1710         int start = flist->used;
1711         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1712
1713         assert(flist != NULL);
1714
1715         if (!(d = opendir(fbuf))) {
1716                 if (errno == ENOENT) {
1717                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1718                                 interpret_stat_error(fbuf, True);
1719                         return;
1720                 }
1721                 io_error |= IOERR_GENERAL;
1722                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1723                 return;
1724         }
1725
1726         p = fbuf + len;
1727         if (len == 1 && *fbuf == '/')
1728                 remainder = MAXPATHLEN - 1;
1729         else if (len < MAXPATHLEN-1) {
1730                 *p++ = '/';
1731                 *p = '\0';
1732                 remainder = MAXPATHLEN - (len + 1);
1733         } else
1734                 remainder = 0;
1735
1736         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1737                 char *dname = d_name(di);
1738                 if (dname[0] == '.' && (dname[1] == '\0'
1739                     || (dname[1] == '.' && dname[2] == '\0')))
1740                         continue;
1741                 unsigned name_len = strlcpy(p, dname, remainder);
1742                 if (name_len >= remainder) {
1743                         char save = fbuf[len];
1744                         fbuf[len] = '\0';
1745                         io_error |= IOERR_GENERAL;
1746                         rprintf(FERROR_XFER,
1747                                 "filename overflows max-path len by %u: %s/%s\n",
1748                                 name_len - remainder + 1, fbuf, dname);
1749                         fbuf[len] = save;
1750                         continue;
1751                 }
1752                 if (dname[0] == '\0') {
1753                         io_error |= IOERR_GENERAL;
1754                         rprintf(FERROR_XFER,
1755                                 "cannot send file with empty name in %s\n",
1756                                 full_fname(fbuf));
1757                         continue;
1758                 }
1759
1760                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1761         }
1762
1763         fbuf[len] = '\0';
1764
1765         if (errno) {
1766                 io_error |= IOERR_GENERAL;
1767                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1768         }
1769
1770         closedir(d);
1771
1772         if (f >= 0 && recurse && !divert_dirs) {
1773                 int i, end = flist->used - 1;
1774                 /* send_if_directory() bumps flist->used, so use "end". */
1775                 for (i = start; i <= end; i++)
1776                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1777         }
1778 }
1779
1780 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1781                               char *start, char *limit, int flags, char name_type)
1782 {
1783         static char lastpath[MAXPATHLEN] = "";
1784         static int lastpath_len = 0;
1785         static struct file_struct *lastpath_struct = NULL;
1786         struct file_struct *file;
1787         item_list *relname_list;
1788         relnamecache **rnpp;
1789         int len, need_new_dir, depth = 0;
1790         filter_rule_list save_filter_list = filter_list;
1791
1792         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1793         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1794
1795         if (inc_recurse) {
1796                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1797                  && lastpath_len == limit - fname
1798                  && strncmp(lastpath, fname, lastpath_len) == 0)
1799                         need_new_dir = 0;
1800                 else
1801                         need_new_dir = 1;
1802         } else {
1803                 char *tp = fname, *lp = lastpath;
1804                 /* Skip any initial directories in our path that we
1805                  * have in common with lastpath. */
1806                 assert(start == fname);
1807                 for ( ; ; tp++, lp++) {
1808                         if (tp == limit) {
1809                                 if (*lp == '/' || *lp == '\0')
1810                                         goto done;
1811                                 break;
1812                         }
1813                         if (*lp != *tp)
1814                                 break;
1815                         if (*tp == '/') {
1816                                 start = tp;
1817                                 depth++;
1818                         }
1819                 }
1820                 need_new_dir = 1;
1821         }
1822
1823         if (need_new_dir) {
1824                 int save_copy_links = copy_links;
1825                 int save_xfer_dirs = xfer_dirs;
1826                 char *slash;
1827
1828                 copy_links = xfer_dirs = 1;
1829
1830                 *limit = '\0';
1831
1832                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1833                         *slash = '\0';
1834                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1835                         depth++;
1836                         if (!inc_recurse && file && S_ISDIR(file->mode))
1837                                 change_local_filter_dir(fname, strlen(fname), depth);
1838                         *slash = '/';
1839                 }
1840
1841                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1842                 if (inc_recurse) {
1843                         if (file && !S_ISDIR(file->mode))
1844                                 file = NULL;
1845                         lastpath_struct = file;
1846                 } else if (file && S_ISDIR(file->mode))
1847                         change_local_filter_dir(fname, strlen(fname), ++depth);
1848
1849                 strlcpy(lastpath, fname, sizeof lastpath);
1850                 lastpath_len = limit - fname;
1851
1852                 *limit = '/';
1853
1854                 copy_links = save_copy_links;
1855                 xfer_dirs = save_xfer_dirs;
1856
1857                 if (!inc_recurse)
1858                         goto done;
1859         }
1860
1861         if (!lastpath_struct)
1862                 goto done; /* dir must have vanished */
1863
1864         len = strlen(limit+1);
1865         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1866         if (!relname_list) {
1867                 if (!(relname_list = new0(item_list)))
1868                         out_of_memory("send_implied_dirs");
1869                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1870         }
1871         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1872         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1873                 out_of_memory("send_implied_dirs");
1874         (*rnpp)->name_type = name_type;
1875         strlcpy((*rnpp)->fname, limit+1, len + 1);
1876
1877 done:
1878         filter_list = save_filter_list;
1879 }
1880
1881 static NORETURN void fatal_unsafe_io_error(void)
1882 {
1883         /* This (sadly) can only happen when pushing data because
1884          * the sender does not know about what kind of delete
1885          * is in effect on the receiving side when pulling. */
1886         rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-during issue with a pre-3.0.7 receiver.\n");
1887         exit_cleanup(RERR_UNSUPPORTED);
1888 }
1889
1890 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1891 {
1892         char fbuf[MAXPATHLEN];
1893         item_list *relname_list;
1894         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1895         size_t j;
1896
1897         f_name(file, fbuf);
1898         dlen = strlen(fbuf);
1899
1900         if (!change_pathname(file, NULL, 0))
1901                 exit_cleanup(RERR_FILESELECT);
1902
1903         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1904
1905         if (file->flags & FLAG_CONTENT_DIR) {
1906                 if (one_file_system) {
1907                         STRUCT_STAT st;
1908                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1909                                 interpret_stat_error(fbuf, True);
1910                                 return;
1911                         }
1912                         filesystem_dev = st.st_dev;
1913                 }
1914                 send_directory(f, flist, fbuf, dlen, flags);
1915         }
1916
1917         if (!relative_paths)
1918                 return;
1919
1920         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1921         if (!relname_list)
1922                 return;
1923
1924         for (j = 0; j < relname_list->count; j++) {
1925                 char *slash;
1926                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1927                 char name_type = rnp->name_type;
1928
1929                 fbuf[dlen] = '/';
1930                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1931                 free(rnp);
1932                 if (len >= (int)sizeof fbuf)
1933                         continue; /* Impossible... */
1934
1935                 slash = strchr(fbuf+dlen+1, '/');
1936                 if (slash) {
1937                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1938                         continue;
1939                 }
1940
1941                 if (name_type != NORMAL_NAME) {
1942                         STRUCT_STAT st;
1943                         if (link_stat(fbuf, &st, 1) != 0) {
1944                                 interpret_stat_error(fbuf, True);
1945                                 continue;
1946                         }
1947                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1948                 } else
1949                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1950         }
1951
1952         free(relname_list);
1953 }
1954
1955 void send_extra_file_list(int f, int at_least)
1956 {
1957         struct file_list *flist;
1958         int64 start_write;
1959         uint16 prev_flags;
1960         int save_io_error = io_error;
1961
1962         if (flist_eof)
1963                 return;
1964
1965         if (at_least < 0)
1966                 at_least = file_total - file_old_total + 1;
1967
1968         /* Keep sending data until we have the requested number of
1969          * files in the upcoming file-lists. */
1970         while (file_total - file_old_total < at_least) {
1971                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1972                 int dir_ndx, dstart = stats.num_dirs;
1973                 const char *pathname = F_PATHNAME(file);
1974                 int32 *dp;
1975
1976                 flist = flist_new(0, "send_extra_file_list");
1977                 start_write = stats.total_written;
1978
1979                 if (unsort_ndx)
1980                         dir_ndx = F_NDX(file);
1981                 else
1982                         dir_ndx = send_dir_ndx;
1983                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1984                 flist->parent_ndx = dir_ndx;
1985
1986                 send1extra(f, file, flist);
1987                 prev_flags = file->flags;
1988                 dp = F_DIR_NODE_P(file);
1989
1990                 /* If there are any duplicate directory names that follow, we
1991                  * send all the dirs together in one file-list.  The dir_flist
1992                  * tree links all the child subdirs onto the last dup dir. */
1993                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1994                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1995                         send_dir_ndx = dir_ndx;
1996                         file = dir_flist->sorted[dir_ndx];
1997                         /* Try to avoid some duplicate scanning of identical dirs. */
1998                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1999                                 file->flags &= ~FLAG_CONTENT_DIR;
2000                         send1extra(f, file, flist);
2001                         prev_flags = file->flags;
2002                         dp = F_DIR_NODE_P(file);
2003                 }
2004
2005                 if (io_error == save_io_error || ignore_errors)
2006                         write_byte(f, 0);
2007                 else if (use_safe_inc_flist) {
2008                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2009                         write_varint(f, io_error);
2010                 } else {
2011                         if (delete_during)
2012                                 fatal_unsafe_io_error();
2013                         write_byte(f, 0);
2014                 }
2015
2016                 if (need_unsorted_flist) {
2017                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2018                                 out_of_memory("send_extra_file_list");
2019                         memcpy(flist->sorted, flist->files,
2020                                flist->used * sizeof (struct file_struct*));
2021                 } else
2022                         flist->sorted = flist->files;
2023
2024                 flist_sort_and_clean(flist, 0);
2025
2026                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
2027                 flist_done_allocating(flist);
2028
2029                 file_total += flist->used;
2030                 stats.flist_size += stats.total_written - start_write;
2031                 stats.num_files += flist->used;
2032                 if (DEBUG_GTE(FLIST, 3))
2033                         output_flist(flist);
2034
2035                 if (DIR_FIRST_CHILD(dp) >= 0) {
2036                         send_dir_ndx = DIR_FIRST_CHILD(dp);
2037                         send_dir_depth++;
2038                 } else {
2039                         while (DIR_NEXT_SIBLING(dp) < 0) {
2040                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
2041                                         write_ndx(f, NDX_FLIST_EOF);
2042                                         flist_eof = 1;
2043                                         if (DEBUG_GTE(FLIST, 3))
2044                                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2045                                         change_local_filter_dir(NULL, 0, 0);
2046                                         goto finish;
2047                                 }
2048                                 send_dir_depth--;
2049                                 file = dir_flist->sorted[send_dir_ndx];
2050                                 dp = F_DIR_NODE_P(file);
2051                         }
2052                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
2053                 }
2054         }
2055
2056   finish:
2057         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
2058                 send_msg_int(MSG_IO_ERROR, io_error);
2059 }
2060
2061 struct file_list *send_file_list(int f, int argc, char *argv[])
2062 {
2063         static const char *lastdir;
2064         static int lastdir_len = -1;
2065         int len, dirlen;
2066         STRUCT_STAT st;
2067         char *p, *dir;
2068         struct file_list *flist;
2069         struct timeval start_tv, end_tv;
2070         int64 start_write;
2071         int use_ff_fd = 0;
2072         int disable_buffering, reenable_multiplex = -1;
2073         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2074         int reading_remotely = filesfrom_host != NULL;
2075         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2076 #ifdef ICONV_OPTION
2077                      | (filesfrom_convert ? RL_CONVERT : 0)
2078 #endif
2079                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2080         int implied_dot_dir = 0;
2081
2082         rprintf(FLOG, "building file list\n");
2083         if (show_filelist_p())
2084                 start_filelist_progress("building file list");
2085         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2086                 rprintf(FCLIENT, "sending incremental file list\n");
2087
2088         start_write = stats.total_written;
2089         gettimeofday(&start_tv, NULL);
2090
2091         if (relative_paths && protocol_version >= 30)
2092                 implied_dirs = 1; /* We send flagged implied dirs */
2093
2094 #ifdef SUPPORT_HARD_LINKS
2095         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2096                 init_hard_links();
2097 #endif
2098
2099         flist = cur_flist = flist_new(0, "send_file_list");
2100         if (inc_recurse) {
2101                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2102                 flags |= FLAG_DIVERT_DIRS;
2103         } else
2104                 dir_flist = cur_flist;
2105
2106         disable_buffering = io_start_buffering_out(f);
2107         if (filesfrom_fd >= 0) {
2108                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2109                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2110                                 full_fname(argv[0]));
2111                         exit_cleanup(RERR_FILESELECT);
2112                 }
2113                 if (protocol_version < 31) {
2114                         /* Older protocols send the files-from data w/o packaging
2115                          * it in multiplexed I/O packets, so temporarily switch
2116                          * to buffered I/O to match this behavior. */
2117                         reenable_multiplex = io_end_multiplex_in(MPLX_TO_BUFFERED);
2118                 }
2119                 use_ff_fd = 1;
2120         }
2121
2122         if (!orig_dir)
2123                 orig_dir = strdup(curr_dir);
2124
2125         while (1) {
2126                 char fbuf[MAXPATHLEN], *fn, name_type;
2127
2128                 if (use_ff_fd) {
2129                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2130                                 break;
2131                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2132                 } else {
2133                         if (argc-- == 0)
2134                                 break;
2135                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2136                         if (sanitize_paths)
2137                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2138                 }
2139
2140                 len = strlen(fbuf);
2141                 if (relative_paths) {
2142                         /* We clean up fbuf below. */
2143                         name_type = NORMAL_NAME;
2144                 } else if (!len || fbuf[len - 1] == '/') {
2145                         if (len == 2 && fbuf[0] == '.') {
2146                                 /* Turn "./" into just "." rather than "./." */
2147                                 fbuf[--len] = '\0';
2148                         } else {
2149                                 if (len + 1 >= MAXPATHLEN)
2150                                         overflow_exit("send_file_list");
2151                                 fbuf[len++] = '.';
2152                                 fbuf[len] = '\0';
2153                         }
2154                         name_type = DOTDIR_NAME;
2155                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2156                     && (len == 2 || fbuf[len-3] == '/')) {
2157                         if (len + 2 >= MAXPATHLEN)
2158                                 overflow_exit("send_file_list");
2159                         fbuf[len++] = '/';
2160                         fbuf[len++] = '.';
2161                         fbuf[len] = '\0';
2162                         name_type = DOTDIR_NAME;
2163                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2164                         name_type = DOTDIR_NAME;
2165                 else
2166                         name_type = NORMAL_NAME;
2167
2168                 dir = NULL;
2169
2170                 if (!relative_paths) {
2171                         p = strrchr(fbuf, '/');
2172                         if (p) {
2173                                 *p = '\0';
2174                                 if (p == fbuf)
2175                                         dir = "/";
2176                                 else
2177                                         dir = fbuf;
2178                                 len -= p - fbuf + 1;
2179                                 fn = p + 1;
2180                         } else
2181                                 fn = fbuf;
2182                 } else {
2183                         if ((p = strstr(fbuf, "/./")) != NULL) {
2184                                 *p = '\0';
2185                                 if (p == fbuf)
2186                                         dir = "/";
2187                                 else {
2188                                         dir = fbuf;
2189                                         clean_fname(dir, 0);
2190                                 }
2191                                 fn = p + 3;
2192                                 while (*fn == '/')
2193                                         fn++;
2194                                 if (!*fn)
2195                                         *--fn = '\0'; /* ensure room for '.' */
2196                         } else
2197                                 fn = fbuf;
2198                         /* A leading ./ can be used in relative mode to affect
2199                          * the dest dir without its name being in the path. */
2200                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2201                                 send_file_name(f, flist, ".", NULL,
2202                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2203                                     ALL_FILTERS);
2204                                 implied_dot_dir = 1;
2205                         }
2206                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2207                                             | CFN_DROP_TRAILING_DOT_DIR);
2208                         if (len == 1) {
2209                                 if (fn[0] == '/') {
2210                                         fn = "/.";
2211                                         len = 2;
2212                                         name_type = DOTDIR_NAME;
2213                                 } else if (fn[0] == '.')
2214                                         name_type = DOTDIR_NAME;
2215                         } else if (fn[len-1] == '/') {
2216                                 fn[--len] = '\0';
2217                                 if (len == 1 && *fn == '.')
2218                                         name_type = DOTDIR_NAME;
2219                                 else
2220                                         name_type = SLASH_ENDING_NAME;
2221                         }
2222                         /* Reject a ".." dir in the active part of the path. */
2223                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2224                                 if ((p[2] == '/' || p[2] == '\0')
2225                                  && (p == fn || p[-1] == '/')) {
2226                                         rprintf(FERROR,
2227                                             "found \"..\" dir in relative path: %s\n",
2228                                             fn);
2229                                         exit_cleanup(RERR_SYNTAX);
2230                                 }
2231                         }
2232                 }
2233
2234                 if (!*fn) {
2235                         len = 1;
2236                         fn = ".";
2237                         name_type = DOTDIR_NAME;
2238                 }
2239
2240                 dirlen = dir ? strlen(dir) : 0;
2241                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2242                         if (!change_pathname(NULL, dir, -dirlen))
2243                                 continue;
2244                         lastdir = pathname;
2245                         lastdir_len = pathname_len;
2246                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2247                         continue;
2248
2249                 if (fn != fbuf)
2250                         memmove(fbuf, fn, len + 1);
2251
2252                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2253                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2254                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2255                         if (errno != ENOENT || missing_args == 0) {
2256                                 /* This is a transfer error, but inhibit deletion
2257                                  * only if we might be omitting an existing file. */
2258                                 if (errno != ENOENT)
2259                                         io_error |= IOERR_GENERAL;
2260                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2261                                         full_fname(fbuf));
2262                                 continue;
2263                         } else if (missing_args == 1) {
2264                                 /* Just ignore the arg. */
2265                                 continue;
2266                         } else /* (missing_args == 2) */ {
2267                                 /* Send the arg as a "missing" entry with
2268                                  * mode 0, which tells the generator to delete it. */
2269                                 memset(&st, 0, sizeof st);
2270                         }
2271                 }
2272
2273                 /* A dot-dir should not be excluded! */
2274                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2275                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2276                         continue;
2277
2278                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2279                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2280                         continue;
2281                 }
2282
2283                 if (inc_recurse && relative_paths && *fbuf) {
2284                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2285                                 if (p - fbuf == 1 && *fbuf == '.') {
2286                                         if ((fn = strchr(p+1, '/')) != NULL)
2287                                                 p = fn;
2288                                 } else
2289                                         fn = p;
2290                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2291                                 if (fn == p)
2292                                         continue;
2293                         }
2294                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2295                         /* Send the implied directories at the start of the
2296                          * source spec, so we get their permissions right. */
2297                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2298                 }
2299
2300                 if (one_file_system)
2301                         filesystem_dev = st.st_dev;
2302
2303                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2304                         struct file_struct *file;
2305                         file = send_file_name(f, flist, fbuf, &st,
2306                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2307                                               NO_FILTERS);
2308                         if (!file)
2309                                 continue;
2310                         if (inc_recurse) {
2311                                 if (name_type == DOTDIR_NAME) {
2312                                         if (send_dir_depth < 0) {
2313                                                 send_dir_depth = 0;
2314                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2315                                         }
2316                                         send_directory(f, flist, fbuf, len, flags);
2317                                 }
2318                         } else
2319                                 send_if_directory(f, flist, file, fbuf, len, flags);
2320                 } else
2321                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2322         }
2323
2324         if (reenable_multiplex >= 0)
2325                 io_start_multiplex_in(reenable_multiplex);
2326
2327         gettimeofday(&end_tv, NULL);
2328         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2329                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2330         if (stats.flist_buildtime == 0)
2331                 stats.flist_buildtime = 1;
2332         start_tv = end_tv;
2333
2334         /* Indicate end of file list */
2335         if (io_error == 0 || ignore_errors)
2336                 write_byte(f, 0);
2337         else if (use_safe_inc_flist) {
2338                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2339                 write_varint(f, io_error);
2340         } else {
2341                 if (delete_during && inc_recurse)
2342                         fatal_unsafe_io_error();
2343                 write_byte(f, 0);
2344         }
2345
2346 #ifdef SUPPORT_HARD_LINKS
2347         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2348                 idev_destroy();
2349 #endif
2350
2351         if (show_filelist_p())
2352                 finish_filelist_progress(flist);
2353
2354         gettimeofday(&end_tv, NULL);
2355         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2356                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2357
2358         /* When converting names, both sides keep an unsorted file-list array
2359          * because the names will differ on the sending and receiving sides
2360          * (both sides will use the unsorted index number for each item). */
2361
2362         /* Sort the list without removing any duplicates.  This allows the
2363          * receiving side to ask for whatever name it kept.  For incremental
2364          * recursion mode, the sender marks duplicate dirs so that it can
2365          * send them together in a single file-list. */
2366         if (need_unsorted_flist) {
2367                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2368                         out_of_memory("send_file_list");
2369                 memcpy(flist->sorted, flist->files,
2370                        flist->used * sizeof (struct file_struct*));
2371         } else
2372                 flist->sorted = flist->files;
2373         flist_sort_and_clean(flist, 0);
2374         file_total += flist->used;
2375         file_old_total += flist->used;
2376
2377         if (numeric_ids <= 0 && !inc_recurse)
2378                 send_id_list(f);
2379
2380         /* send the io_error flag */
2381         if (protocol_version < 30)
2382                 write_int(f, ignore_errors ? 0 : io_error);
2383         else if (!use_safe_inc_flist && io_error && !ignore_errors)
2384                 send_msg_int(MSG_IO_ERROR, io_error);
2385
2386         if (disable_buffering)
2387                 io_end_buffering_out(IOBUF_FREE_BUFS);
2388
2389         stats.flist_size = stats.total_written - start_write;
2390         stats.num_files = flist->used;
2391
2392         if (DEBUG_GTE(FLIST, 3))
2393                 output_flist(flist);
2394
2395         if (DEBUG_GTE(FLIST, 2))
2396                 rprintf(FINFO, "send_file_list done\n");
2397
2398         if (inc_recurse) {
2399                 send_dir_depth = 1;
2400                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2401                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2402                         flist->parent_ndx = -1;
2403                 flist_done_allocating(flist);
2404                 if (send_dir_ndx < 0) {
2405                         write_ndx(f, NDX_FLIST_EOF);
2406                         flist_eof = 1;
2407                         if (DEBUG_GTE(FLIST, 3))
2408                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2409                 }
2410                 else if (file_total == 1) {
2411                         /* If we're creating incremental file-lists and there
2412                          * was just 1 item in the first file-list, send 1 more
2413                          * file-list to check if this is a 1-file xfer. */
2414                         send_extra_file_list(f, 1);
2415                 }
2416         } else {
2417                 flist_eof = 1;
2418                 if (DEBUG_GTE(FLIST, 3))
2419                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2420         }
2421
2422         return flist;
2423 }
2424
2425 struct file_list *recv_file_list(int f)
2426 {
2427         struct file_list *flist;
2428         int dstart, flags;
2429         int64 start_read;
2430
2431         if (!first_flist) {
2432                 if (show_filelist_p())
2433                         start_filelist_progress("receiving file list");
2434                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2435                         rprintf(FCLIENT, "receiving incremental file list\n");
2436                 rprintf(FLOG, "receiving file list\n");
2437                 if (usermap)
2438                         parse_name_map(usermap, True);
2439                 if (groupmap)
2440                         parse_name_map(groupmap, False);
2441         }
2442
2443         start_read = stats.total_read;
2444
2445 #ifdef SUPPORT_HARD_LINKS
2446         if (preserve_hard_links && !first_flist)
2447                 init_hard_links();
2448 #endif
2449
2450         flist = flist_new(0, "recv_file_list");
2451
2452         if (inc_recurse) {
2453                 if (flist->ndx_start == 1)
2454                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2455                 dstart = dir_flist->used;
2456         } else {
2457                 dir_flist = flist;
2458                 dstart = 0;
2459         }
2460
2461         while ((flags = read_byte(f)) != 0) {
2462                 struct file_struct *file;
2463
2464                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2465                         flags |= read_byte(f) << 8;
2466
2467                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2468                         int err;
2469                         if (!use_safe_inc_flist) {
2470                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2471                                 exit_cleanup(RERR_PROTOCOL);
2472                         }
2473                         err = read_varint(f);
2474                         if (!ignore_errors)
2475                                 io_error |= err;
2476                         break;
2477                 }
2478
2479                 flist_expand(flist, 1);
2480                 file = recv_file_entry(f, flist, flags);
2481
2482                 if (S_ISREG(file->mode)) {
2483                         /* Already counted */
2484                 } else if (S_ISDIR(file->mode)) {
2485                         if (inc_recurse) {
2486                                 flist_expand(dir_flist, 1);
2487                                 dir_flist->files[dir_flist->used++] = file;
2488                         }
2489                         stats.num_dirs++;
2490                 } else if (S_ISLNK(file->mode))
2491                         stats.num_symlinks++;
2492                 else if (IS_DEVICE(file->mode))
2493                         stats.num_symlinks++;
2494                 else
2495                         stats.num_specials++;
2496
2497                 flist->files[flist->used++] = file;
2498
2499                 maybe_emit_filelist_progress(flist->used);
2500
2501                 if (DEBUG_GTE(FLIST, 2)) {
2502                         char *name = f_name(file, NULL);
2503                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2504                 }
2505         }
2506         file_total += flist->used;
2507
2508         if (DEBUG_GTE(FLIST, 2))
2509                 rprintf(FINFO, "received %d names\n", flist->used);
2510
2511         if (show_filelist_p())
2512                 finish_filelist_progress(flist);
2513
2514         if (need_unsorted_flist) {
2515                 /* Create an extra array of index pointers that we can sort for
2516                  * the generator's use (for wading through the files in sorted
2517                  * order and for calling flist_find()).  We keep the "files"
2518                  * list unsorted for our exchange of index numbers with the
2519                  * other side (since their names may not sort the same). */
2520                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2521                         out_of_memory("recv_file_list");
2522                 memcpy(flist->sorted, flist->files,
2523                        flist->used * sizeof (struct file_struct*));
2524                 if (inc_recurse && dir_flist->used > dstart) {
2525                         static int dir_flist_malloced = 0;
2526                         if (dir_flist_malloced < dir_flist->malloced) {
2527                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2528                                                         struct file_struct *,
2529                                                         dir_flist->malloced);
2530                                 dir_flist_malloced = dir_flist->malloced;
2531                         }
2532                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2533                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2534                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2535                 }
2536         } else {
2537                 flist->sorted = flist->files;
2538                 if (inc_recurse && dir_flist->used > dstart) {
2539                         dir_flist->sorted = dir_flist->files;
2540                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2541                 }
2542         }
2543
2544         if (inc_recurse)
2545                 flist_done_allocating(flist);
2546         else if (f >= 0) {
2547                 recv_id_list(f, flist);
2548                 flist_eof = 1;
2549                 if (DEBUG_GTE(FLIST, 3))
2550                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2551         }
2552
2553         flist_sort_and_clean(flist, relative_paths);
2554
2555         if (protocol_version < 30) {
2556                 /* Recv the io_error flag */
2557                 int err = read_int(f);
2558                 if (!ignore_errors)
2559                         io_error |= err;
2560         } else if (inc_recurse && flist->ndx_start == 1) {
2561                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2562                         flist->parent_ndx = -1;
2563         }
2564
2565         if (DEBUG_GTE(FLIST, 3))
2566                 output_flist(flist);
2567
2568         if (DEBUG_GTE(FLIST, 2))
2569                 rprintf(FINFO, "recv_file_list done\n");
2570
2571         stats.flist_size += stats.total_read - start_read;
2572         stats.num_files += flist->used;
2573
2574         return flist;
2575 }
2576
2577 /* This is only used once by the receiver if the very first file-list
2578  * has exactly one item in it. */
2579 void recv_additional_file_list(int f)
2580 {
2581         struct file_list *flist;
2582         int ndx = read_ndx(f);
2583         if (ndx == NDX_FLIST_EOF) {
2584                 flist_eof = 1;
2585                 if (DEBUG_GTE(FLIST, 3))
2586                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2587                 change_local_filter_dir(NULL, 0, 0);
2588         } else {
2589                 ndx = NDX_FLIST_OFFSET - ndx;
2590                 if (ndx < 0 || ndx >= dir_flist->used) {
2591                         ndx = NDX_FLIST_OFFSET - ndx;
2592                         rprintf(FERROR,
2593                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2594                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2595                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2596                         exit_cleanup(RERR_PROTOCOL);
2597                 }
2598                 if (DEBUG_GTE(FLIST, 3)) {
2599                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2600                                 who_am_i(), ndx);
2601                 }
2602                 flist = recv_file_list(f);
2603                 flist->parent_ndx = ndx;
2604         }
2605 }
2606
2607 /* Search for an identically-named item in the file list.  Note that the
2608  * items must agree in their directory-ness, or no match is returned. */
2609 int flist_find(struct file_list *flist, struct file_struct *f)
2610 {
2611         int low = flist->low, high = flist->high;
2612         int diff, mid, mid_up;
2613
2614         while (low <= high) {
2615                 mid = (low + high) / 2;
2616                 if (F_IS_ACTIVE(flist->sorted[mid]))
2617                         mid_up = mid;
2618                 else {
2619                         /* Scan for the next non-empty entry using the cached
2620                          * distance values.  If the value isn't fully up-to-
2621                          * date, update it. */
2622                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2623                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2624                                 do {
2625                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2626                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2627                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2628                         }
2629                         if (mid_up > high) {
2630                                 /* If there's nothing left above us, set high to
2631                                  * a non-empty entry below us and continue. */
2632                                 high = mid - (int)flist->sorted[mid]->len32;
2633                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2634                                         do {
2635                                             high -= (int)flist->sorted[high]->len32;
2636                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2637                                         flist->sorted[mid]->len32 = mid - high;
2638                                 }
2639                                 continue;
2640                         }
2641                 }
2642                 diff = f_name_cmp(flist->sorted[mid_up], f);
2643                 if (diff == 0) {
2644                         if (protocol_version < 29
2645                             && S_ISDIR(flist->sorted[mid_up]->mode)
2646                             != S_ISDIR(f->mode))
2647                                 return -1;
2648                         return mid_up;
2649                 }
2650                 if (diff < 0)
2651                         low = mid_up + 1;
2652                 else
2653                         high = mid - 1;
2654         }
2655         return -1;
2656 }
2657
2658 /* Search for an identically-named item in the file list.  Differs from
2659  * flist_find in that an item that agrees with "f" in directory-ness is
2660  * preferred but one that does not is still found. */
2661 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2662 {
2663         mode_t save_mode;
2664         int ndx;
2665
2666         /* First look for an item that agrees in directory-ness. */
2667         ndx = flist_find(flist, f);
2668         if (ndx >= 0)
2669                 return ndx;
2670
2671         /* Temporarily flip f->mode to look for an item of opposite
2672          * directory-ness. */
2673         save_mode = f->mode;
2674         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2675         ndx = flist_find(flist, f);
2676         f->mode = save_mode;
2677         return ndx;
2678 }
2679
2680 /*
2681  * Free up any resources a file_struct has allocated
2682  * and clear the file.
2683  */
2684 void clear_file(struct file_struct *file)
2685 {
2686         /* The +1 zeros out the first char of the basename. */
2687         memset(file, 0, FILE_STRUCT_LEN + 1);
2688         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2689          * entry.  Likewise for len32 in the opposite direction.  We assume
2690          * that we're alone for now since flist_find() will adjust the counts
2691          * it runs into that aren't up-to-date. */
2692         file->len32 = F_DEPTH(file) = 1;
2693 }
2694
2695 /* Allocate a new file list. */
2696 struct file_list *flist_new(int flags, char *msg)
2697 {
2698         struct file_list *flist;
2699
2700         if (!(flist = new0(struct file_list)))
2701                 out_of_memory(msg);
2702
2703         if (flags & FLIST_TEMP) {
2704                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2705                                                      out_of_memory,
2706                                                      POOL_INTERN)))
2707                         out_of_memory(msg);
2708         } else {
2709                 /* This is a doubly linked list with prev looping back to
2710                  * the end of the list, but the last next pointer is NULL. */
2711                 if (!first_flist) {
2712                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2713                                                        out_of_memory,
2714                                                        POOL_INTERN);
2715                         if (!flist->file_pool)
2716                                 out_of_memory(msg);
2717
2718                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2719
2720                         first_flist = cur_flist = flist->prev = flist;
2721                 } else {
2722                         struct file_list *prev = first_flist->prev;
2723
2724                         flist->file_pool = first_flist->file_pool;
2725
2726                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2727                         flist->flist_num = prev->flist_num + 1;
2728
2729                         flist->prev = prev;
2730                         prev->next = first_flist->prev = flist;
2731                 }
2732                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2733                 flist_cnt++;
2734         }
2735
2736         return flist;
2737 }
2738
2739 /* Free up all elements in a flist. */
2740 void flist_free(struct file_list *flist)
2741 {
2742         if (!flist->prev) {
2743                 /* Was FLIST_TEMP dir-list. */
2744         } else if (flist == flist->prev) {
2745                 first_flist = cur_flist = NULL;
2746                 file_total = 0;
2747                 flist_cnt = 0;
2748         } else {
2749                 if (flist == cur_flist)
2750                         cur_flist = flist->next;
2751                 if (flist == first_flist)
2752                         first_flist = first_flist->next;
2753                 else {
2754                         flist->prev->next = flist->next;
2755                         if (!flist->next)
2756                                 flist->next = first_flist;
2757                 }
2758                 flist->next->prev = flist->prev;
2759                 file_total -= flist->used;
2760                 flist_cnt--;
2761         }
2762
2763         if (!flist->prev || !flist_cnt)
2764                 pool_destroy(flist->file_pool);
2765         else
2766                 pool_free_old(flist->file_pool, flist->pool_boundary);
2767
2768         if (flist->sorted && flist->sorted != flist->files)
2769                 free(flist->sorted);
2770         free(flist->files);
2771         free(flist);
2772 }
2773
2774 /* This routine ensures we don't have any duplicate names in our file list.
2775  * duplicate names can cause corruption because of the pipelining. */
2776 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2777 {
2778         char fbuf[MAXPATHLEN];
2779         int i, prev_i;
2780
2781         if (!flist)
2782                 return;
2783         if (flist->used == 0) {
2784                 flist->high = -1;
2785                 flist->low = 0;
2786                 return;
2787         }
2788
2789         fsort(flist->sorted, flist->used);
2790
2791         if (!am_sender || inc_recurse) {
2792                 for (i = prev_i = 0; i < flist->used; i++) {
2793                         if (F_IS_ACTIVE(flist->sorted[i])) {
2794                                 prev_i = i;
2795                                 break;
2796                         }
2797                 }
2798                 flist->low = prev_i;
2799         } else {
2800                 i = prev_i = flist->used - 1;
2801                 flist->low = 0;
2802         }
2803
2804         while (++i < flist->used) {
2805                 int j;
2806                 struct file_struct *file = flist->sorted[i];
2807
2808                 if (!F_IS_ACTIVE(file))
2809                         continue;
2810                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2811                         j = prev_i;
2812                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2813                         int save_mode = file->mode;
2814                         /* Make sure that this directory doesn't duplicate a
2815                          * non-directory earlier in the list. */
2816                         flist->high = prev_i;
2817                         file->mode = S_IFREG;
2818                         j = flist_find(flist, file);
2819                         file->mode = save_mode;
2820                 } else
2821                         j = -1;
2822                 if (j >= 0) {
2823                         int keep, drop;
2824                         /* If one is a dir and the other is not, we want to
2825                          * keep the dir because it might have contents in the
2826                          * list.  Otherwise keep the first one. */
2827                         if (S_ISDIR(file->mode)) {
2828                                 struct file_struct *fp = flist->sorted[j];
2829                                 if (!S_ISDIR(fp->mode))
2830                                         keep = i, drop = j;
2831                                 else {
2832                                         if (am_sender)
2833                                                 file->flags |= FLAG_DUPLICATE;
2834                                         else { /* Make sure we merge our vital flags. */
2835                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2836                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2837                                         }
2838                                         keep = j, drop = i;
2839                                 }
2840                         } else
2841                                 keep = j, drop = i;
2842
2843                         if (!am_sender) {
2844                                 if (DEBUG_GTE(DUP, 1)) {
2845                                         rprintf(FINFO,
2846                                             "removing duplicate name %s from file list (%d)\n",
2847                                             f_name(file, fbuf), drop + flist->ndx_start);
2848                                 }
2849                                 clear_file(flist->sorted[drop]);
2850                         }
2851
2852                         if (keep == i) {
2853                                 if (flist->low == drop) {
2854                                         for (j = drop + 1;
2855                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2856                                              j++) {}
2857                                         flist->low = j;
2858                                 }
2859                                 prev_i = i;
2860                         }
2861                 } else
2862                         prev_i = i;
2863         }
2864         flist->high = prev_i;
2865
2866         if (strip_root) {
2867                 /* We need to strip off the leading slashes for relative
2868                  * paths, but this must be done _after_ the sorting phase. */
2869                 for (i = flist->low; i <= flist->high; i++) {
2870                         struct file_struct *file = flist->sorted[i];
2871
2872                         if (!file->dirname)
2873                                 continue;
2874                         while (*file->dirname == '/')
2875                                 file->dirname++;
2876                         if (!*file->dirname)
2877                                 file->dirname = NULL;
2878                 }
2879         }
2880
2881         if (prune_empty_dirs && !am_sender) {
2882                 int j, prev_depth = 0;
2883
2884                 prev_i = 0; /* It's OK that this isn't really true. */
2885
2886                 for (i = flist->low; i <= flist->high; i++) {
2887                         struct file_struct *fp, *file = flist->sorted[i];
2888
2889                         /* This temporarily abuses the F_DEPTH() value for a
2890                          * directory that is in a chain that might get pruned.
2891                          * We restore the old value if it gets a reprieve. */
2892                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2893                                 /* Dump empty dirs when coming back down. */
2894                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2895                                         fp = flist->sorted[prev_i];
2896                                         if (F_DEPTH(fp) >= 0)
2897                                                 break;
2898                                         prev_i = -F_DEPTH(fp)-1;
2899                                         clear_file(fp);
2900                                 }
2901                                 prev_depth = F_DEPTH(file);
2902                                 if (is_excluded(f_name(file, fbuf), 1,
2903                                                        ALL_FILTERS)) {
2904                                         /* Keep dirs through this dir. */
2905                                         for (j = prev_depth-1; ; j--) {
2906                                                 fp = flist->sorted[prev_i];
2907                                                 if (F_DEPTH(fp) >= 0)
2908                                                         break;
2909                                                 prev_i = -F_DEPTH(fp)-1;
2910                                                 F_DEPTH(fp) = j;
2911                                         }
2912                                 } else
2913                                         F_DEPTH(file) = -prev_i-1;
2914                                 prev_i = i;
2915                         } else {
2916                                 /* Keep dirs through this non-dir. */
2917                                 for (j = prev_depth; ; j--) {
2918                                         fp = flist->sorted[prev_i];
2919                                         if (F_DEPTH(fp) >= 0)
2920                                                 break;
2921                                         prev_i = -F_DEPTH(fp)-1;
2922                                         F_DEPTH(fp) = j;
2923                                 }
2924                         }
2925                 }
2926                 /* Dump all remaining empty dirs. */
2927                 while (1) {
2928                         struct file_struct *fp = flist->sorted[prev_i];
2929                         if (F_DEPTH(fp) >= 0)
2930                                 break;
2931                         prev_i = -F_DEPTH(fp)-1;
2932                         clear_file(fp);
2933                 }
2934
2935                 for (i = flist->low; i <= flist->high; i++) {
2936                         if (F_IS_ACTIVE(flist->sorted[i]))
2937                                 break;
2938                 }
2939                 flist->low = i;
2940                 for (i = flist->high; i >= flist->low; i--) {
2941                         if (F_IS_ACTIVE(flist->sorted[i]))
2942                                 break;
2943                 }
2944                 flist->high = i;
2945         }
2946 }
2947
2948 static void output_flist(struct file_list *flist)
2949 {
2950         char uidbuf[16], gidbuf[16], depthbuf[16];
2951         struct file_struct *file;
2952         const char *root, *dir, *slash, *name, *trail;
2953         const char *who = who_am_i();
2954         int i;
2955
2956         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2957                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2958         for (i = 0; i < flist->used; i++) {
2959                 file = flist->files[i];
2960                 if ((am_root || am_sender) && uid_ndx) {
2961                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2962                                  F_OWNER(file));
2963                 } else
2964                         *uidbuf = '\0';
2965                 if (gid_ndx) {
2966                         static char parens[] = "(\0)\0\0\0";
2967                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2968                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2969                                  pp, F_GROUP(file), pp + 2);
2970                 } else
2971                         *gidbuf = '\0';
2972                 if (!am_sender)
2973                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2974                 if (F_IS_ACTIVE(file)) {
2975                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2976                         if ((dir = file->dirname) == NULL)
2977                                 dir = slash = "";
2978                         else
2979                                 slash = "/";
2980                         name = file->basename;
2981                         trail = S_ISDIR(file->mode) ? "/" : "";
2982                 } else
2983                         root = dir = slash = name = trail = "";
2984                 rprintf(FINFO,
2985                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2986                         who, i + flist->ndx_start,
2987                         root, dir, slash, name, trail,
2988                         (int)file->mode, comma_num(F_LENGTH(file)),
2989                         uidbuf, gidbuf, file->flags);
2990         }
2991 }
2992
2993 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2994 enum fnc_type { t_PATH, t_ITEM };
2995
2996 static int found_prefix;
2997
2998 /* Compare the names of two file_struct entities, similar to how strcmp()
2999  * would do if it were operating on the joined strings.
3000  *
3001  * Some differences beginning with protocol_version 29: (1) directory names
3002  * are compared with an assumed trailing slash so that they compare in a
3003  * way that would cause them to sort immediately prior to any content they
3004  * may have; (2) a directory of any name compares after a non-directory of
3005  * any name at the same depth; (3) a directory with name "." compares prior
3006  * to anything else.  These changes mean that a directory and a non-dir
3007  * with the same name will not compare as equal (protocol_version >= 29).
3008  *
3009  * The dirname component can be an empty string, but the basename component
3010  * cannot (and never is in the current codebase).  The basename component
3011  * may be NULL (for a removed item), in which case it is considered to be
3012  * after any existing item. */
3013 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
3014 {
3015         int dif;
3016         const uchar *c1, *c2;
3017         enum fnc_state state1, state2;
3018         enum fnc_type type1, type2;
3019         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
3020
3021         if (!f1 || !F_IS_ACTIVE(f1)) {
3022                 if (!f2 || !F_IS_ACTIVE(f2))
3023                         return 0;
3024                 return -1;
3025         }
3026         if (!f2 || !F_IS_ACTIVE(f2))
3027                 return 1;
3028
3029         c1 = (uchar*)f1->dirname;
3030         c2 = (uchar*)f2->dirname;
3031         if (c1 == c2)
3032                 c1 = c2 = NULL;
3033         if (!c1) {
3034                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3035                 c1 = (const uchar*)f1->basename;
3036                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3037                         type1 = t_ITEM;
3038                         state1 = s_TRAILING;
3039                         c1 = (uchar*)"";
3040                 } else
3041                         state1 = s_BASE;
3042         } else {
3043                 type1 = t_path;
3044                 state1 = s_DIR;
3045         }
3046         if (!c2) {
3047                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3048                 c2 = (const uchar*)f2->basename;
3049                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3050                         type2 = t_ITEM;
3051                         state2 = s_TRAILING;
3052                         c2 = (uchar*)"";
3053                 } else
3054                         state2 = s_BASE;
3055         } else {
3056                 type2 = t_path;
3057                 state2 = s_DIR;
3058         }
3059
3060         if (type1 != type2)
3061                 return type1 == t_PATH ? 1 : -1;
3062
3063         do {
3064                 if (!*c1) {
3065                         switch (state1) {
3066                         case s_DIR:
3067                                 state1 = s_SLASH;
3068                                 c1 = (uchar*)"/";
3069                                 break;
3070                         case s_SLASH:
3071                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3072                                 c1 = (const uchar*)f1->basename;
3073                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3074                                         type1 = t_ITEM;
3075                                         state1 = s_TRAILING;
3076                                         c1 = (uchar*)"";
3077                                 } else
3078                                         state1 = s_BASE;
3079                                 break;
3080                         case s_BASE:
3081                                 state1 = s_TRAILING;
3082                                 if (type1 == t_PATH) {
3083                                         c1 = (uchar*)"/";
3084                                         break;
3085                                 }
3086                                 /* FALL THROUGH */
3087                         case s_TRAILING:
3088                                 type1 = t_ITEM;
3089                                 break;
3090                         }
3091                         if (*c2 && type1 != type2)
3092                                 return type1 == t_PATH ? 1 : -1;
3093                 }
3094                 if (!*c2) {
3095                         switch (state2) {
3096                         case s_DIR:
3097                                 state2 = s_SLASH;
3098                                 c2 = (uchar*)"/";
3099                                 break;
3100                         case s_SLASH:
3101                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3102                                 c2 = (const uchar*)f2->basename;
3103                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3104                                         type2 = t_ITEM;
3105                                         state2 = s_TRAILING;
3106                                         c2 = (uchar*)"";
3107                                 } else
3108                                         state2 = s_BASE;
3109                                 break;
3110                         case s_BASE:
3111                                 state2 = s_TRAILING;
3112                                 if (type2 == t_PATH) {
3113                                         c2 = (uchar*)"/";
3114                                         break;
3115                                 }
3116                                 /* FALL THROUGH */
3117                         case s_TRAILING:
3118                                 found_prefix = 1;
3119                                 if (!*c1)
3120                                         return 0;
3121                                 type2 = t_ITEM;
3122                                 break;
3123                         }
3124                         if (type1 != type2)
3125                                 return type1 == t_PATH ? 1 : -1;
3126                 }
3127         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3128
3129         return dif;
3130 }
3131
3132 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3133  * not match if f2's basename is not an exact match of a path element in f1.
3134  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3135 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3136 {
3137         found_prefix = 0;
3138         f_name_cmp(f1, f2);
3139         return found_prefix;
3140 }
3141
3142 char *f_name_buf(void)
3143 {
3144         static char names[5][MAXPATHLEN];
3145         static unsigned int n;
3146
3147         n = (n + 1) % (sizeof names / sizeof names[0]);
3148
3149         return names[n];
3150 }
3151
3152 /* Return a copy of the full filename of a flist entry, using the indicated
3153  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3154  * done because we checked the size when creating the file_struct entry.
3155  */
3156 char *f_name(const struct file_struct *f, char *fbuf)
3157 {
3158         if (!f || !F_IS_ACTIVE(f))
3159                 return NULL;
3160
3161         if (!fbuf)
3162                 fbuf = f_name_buf();
3163
3164         if (f->dirname) {
3165                 int len = strlen(f->dirname);
3166                 memcpy(fbuf, f->dirname, len);
3167                 fbuf[len] = '/';
3168                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3169         } else
3170                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3171
3172         return fbuf;
3173 }
3174
3175 /* Do a non-recursive scan of the named directory, possibly ignoring all
3176  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3177  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3178  * buffer (the functions we call will append names onto the end, but the old
3179  * dir value will be restored on exit). */
3180 struct file_list *get_dirlist(char *dirname, int dlen, int flags)
3181 {
3182         struct file_list *dirlist;
3183         char dirbuf[MAXPATHLEN];
3184         int save_recurse = recurse;
3185         int save_xfer_dirs = xfer_dirs;
3186         int save_prune_empty_dirs = prune_empty_dirs;
3187         int senddir_fd = flags & GDL_IGNORE_FILTER_RULES ? -2 : -1;
3188
3189         if (dlen < 0) {
3190                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3191                 if (dlen >= MAXPATHLEN)
3192                         return NULL;
3193                 dirname = dirbuf;
3194         }
3195
3196         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3197
3198         recurse = 0;
3199         xfer_dirs = 1;
3200         send_directory(senddir_fd, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3201         xfer_dirs = save_xfer_dirs;
3202         recurse = save_recurse;
3203         if (INFO_GTE(PROGRESS, 1))
3204                 flist_count_offset += dirlist->used;
3205
3206         prune_empty_dirs = 0;
3207         dirlist->sorted = dirlist->files;
3208         flist_sort_and_clean(dirlist, 0);
3209         prune_empty_dirs = save_prune_empty_dirs;
3210
3211         if (DEBUG_GTE(FLIST, 3))
3212                 output_flist(dirlist);
3213
3214         return dirlist;
3215 }