Fix extern of preallocated_len w/o SUPPORT_PREALLOCATION.
[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) 2002-2013 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 #define PTR_SIZE (sizeof (struct file_struct *))
90
91 int io_error;
92 int checksum_len;
93 dev_t filesystem_dev; /* used to implement -x */
94
95 struct file_list *cur_flist, *first_flist, *dir_flist;
96 int send_dir_ndx = -1, send_dir_depth = -1;
97 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
98 int file_total = 0; /* total of all active items over all file-lists */
99 int file_old_total = 0; /* total of active items that will soon be gone */
100 int flist_eof = 0; /* all the file-lists are now known */
101
102 #define NORMAL_NAME 0
103 #define SLASH_ENDING_NAME 1
104 #define DOTDIR_NAME 2
105 #define MISSING_NAME 3
106
107 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
108  * internally, even if this platform does not allow files to have 64-bit inums.
109  * The only exception is if we're on a platform with no 64-bit type at all.
110  *
111  * Because we use read_longint() to get these off the wire, if you transfer
112  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
113  * machine with no 64-bit types then you will get an overflow error.
114  *
115  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
116  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
117  * be truncated.  But it's a kind of silly thing to do anyhow. */
118
119 /* The tmp_* vars are used as a cache area by make_file() to store data
120  * that the sender doesn't need to remember in its file list.  The data
121  * will survive just long enough to be used by send_file_entry(). */
122 static dev_t tmp_rdev;
123 #ifdef SUPPORT_HARD_LINKS
124 static int64 tmp_dev = -1, tmp_ino;
125 #endif
126 static char tmp_sum[MAX_DIGEST_LEN];
127
128 static char empty_sum[MAX_DIGEST_LEN];
129 static int flist_count_offset; /* for --delete --progress */
130
131 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
132 static void output_flist(struct file_list *flist);
133
134 void init_flist(void)
135 {
136         if (DEBUG_GTE(FLIST, 4)) {
137                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
138                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
139         }
140         checksum_len = protocol_version < 21 ? 2
141                      : protocol_version < 30 ? MD4_DIGEST_LEN
142                      : MD5_DIGEST_LEN;
143 }
144
145 static int show_filelist_p(void)
146 {
147         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
148 }
149
150 static void start_filelist_progress(char *kind)
151 {
152         rprintf(FCLIENT, "%s ... ", kind);
153         output_needs_newline = 1;
154         rflush(FINFO);
155 }
156
157 static void emit_filelist_progress(int count)
158 {
159         rprintf(FCLIENT, " %d files...\r", count);
160 }
161
162 static void maybe_emit_filelist_progress(int count)
163 {
164         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
165                 emit_filelist_progress(count);
166 }
167
168 static void finish_filelist_progress(const struct file_list *flist)
169 {
170         if (INFO_GTE(FLIST, 2)) {
171                 /* This overwrites the progress line */
172                 rprintf(FINFO, "%d file%sto consider\n",
173                         flist->used, flist->used == 1 ? " " : "s ");
174         } else {
175                 output_needs_newline = 0;
176                 rprintf(FINFO, "done\n");
177         }
178 }
179
180 void show_flist_stats(void)
181 {
182         /* Nothing yet */
183 }
184
185 /* Stat either a symlink or its referent, depending on the settings of
186  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
187  *
188  * If path is the name of a symlink, then the linkbuf buffer (which must hold
189  * MAXPATHLEN chars) will be set to the symlink's target string.
190  *
191  * The stat structure pointed to by stp will contain information about the
192  * link or the referent as appropriate, if they exist. */
193 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
194 {
195 #ifdef SUPPORT_LINKS
196         if (link_stat(path, stp, copy_dirlinks) < 0)
197                 return -1;
198         if (S_ISLNK(stp->st_mode)) {
199                 int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1);
200                 if (llen < 0)
201                         return -1;
202                 linkbuf[llen] = '\0';
203                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
204                         if (INFO_GTE(SYMSAFE, 1)) {
205                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
206                                         path, linkbuf);
207                         }
208                         return x_stat(path, stp, NULL);
209                 }
210                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
211                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
212                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
213                                 llen - SYMLINK_PREFIX_LEN + 1);
214                 }
215         }
216         return 0;
217 #else
218         return x_stat(path, stp, NULL);
219 #endif
220 }
221
222 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
223 {
224 #ifdef SUPPORT_LINKS
225         if (copy_links)
226                 return x_stat(path, stp, NULL);
227         if (x_lstat(path, stp, NULL) < 0)
228                 return -1;
229         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
230                 STRUCT_STAT st;
231                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
232                         *stp = st;
233         }
234         return 0;
235 #else
236         return x_stat(path, stp, NULL);
237 #endif
238 }
239
240 static inline int is_daemon_excluded(const char *fname, int is_dir)
241 {
242         if (daemon_filter_list.head
243          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
244                 errno = ENOENT;
245                 return 1;
246         }
247         return 0;
248 }
249
250 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
251 {
252         if (daemon_filter_list.head) {
253                 char *slash = path;
254
255                 while ((slash = strchr(slash+1, '/')) != NULL) {
256                         int ret;
257                         *slash = '\0';
258                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
259                         *slash = '/';
260                         if (ret < 0) {
261                                 errno = ENOENT;
262                                 return 1;
263                         }
264                 }
265
266                 if (!ignore_filename
267                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
268                         errno = ENOENT;
269                         return 1;
270                 }
271         }
272
273         return 0;
274 }
275
276 /* This function is used to check if a file should be included/excluded
277  * from the list of files based on its name and type etc.  The value of
278  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
279 static int is_excluded(const char *fname, int is_dir, int filter_level)
280 {
281 #if 0 /* This currently never happens, so avoid a useless compare. */
282         if (filter_level == NO_FILTERS)
283                 return 0;
284 #endif
285         if (is_daemon_excluded(fname, is_dir))
286                 return 1;
287         if (filter_level != ALL_FILTERS)
288                 return 0;
289         if (filter_list.head
290             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
291                 return 1;
292         return 0;
293 }
294
295 static void send_directory(int f, struct file_list *flist,
296                            char *fbuf, int len, int flags);
297
298 static const char *pathname, *orig_dir;
299 static int pathname_len;
300
301 /* Make sure flist can hold at least flist->used + extra entries. */
302 static void flist_expand(struct file_list *flist, int extra)
303 {
304         struct file_struct **new_ptr;
305
306         if (flist->used + extra <= flist->malloced)
307                 return;
308
309         if (flist->malloced < FLIST_START)
310                 flist->malloced = FLIST_START;
311         else if (flist->malloced >= FLIST_LINEAR)
312                 flist->malloced += FLIST_LINEAR;
313         else
314                 flist->malloced *= 2;
315
316         /* In case count jumped or we are starting the list
317          * with a known size just set it. */
318         if (flist->malloced < flist->used + extra)
319                 flist->malloced = flist->used + extra;
320
321         new_ptr = realloc_array(flist->files, struct file_struct *,
322                                 flist->malloced);
323
324         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
325                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
326                     who_am_i(),
327                     big_num(sizeof flist->files[0] * flist->malloced),
328                     (new_ptr == flist->files) ? " not" : "");
329         }
330
331         flist->files = new_ptr;
332
333         if (!flist->files)
334                 out_of_memory("flist_expand");
335 }
336
337 static void flist_done_allocating(struct file_list *flist)
338 {
339         void *ptr = pool_boundary(flist->file_pool, 8*1024);
340         if (flist->pool_boundary == ptr)
341                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
342         else
343                 flist->pool_boundary = ptr;
344 }
345
346 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
347  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
348  * with dir == NULL taken to be the starting directory, and dirlen < 0
349  * indicating that strdup(dir) should be called and then the -dirlen length
350  * value checked to ensure that it is not daemon-excluded. */
351 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
352 {
353         if (dirlen < 0) {
354                 char *cpy = strdup(dir);
355                 if (*cpy != '/')
356                         change_dir(orig_dir, CD_SKIP_CHDIR);
357                 if (path_is_daemon_excluded(cpy, 0))
358                         goto chdir_error;
359                 dir = cpy;
360                 dirlen = -dirlen;
361         } else {
362                 if (file) {
363                         if (pathname == F_PATHNAME(file))
364                                 return 1;
365                         dir = F_PATHNAME(file);
366                         if (dir)
367                                 dirlen = strlen(dir);
368                 } else if (pathname == dir)
369                         return 1;
370                 if (dir && *dir != '/')
371                         change_dir(orig_dir, CD_SKIP_CHDIR);
372         }
373
374         pathname = dir;
375         pathname_len = dirlen;
376
377         if (!dir)
378                 dir = orig_dir;
379
380         if (!change_dir(dir, CD_NORMAL)) {
381           chdir_error:
382                 io_error |= IOERR_GENERAL;
383                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
384                 if (dir != orig_dir)
385                         change_dir(orig_dir, CD_NORMAL);
386                 pathname = NULL;
387                 pathname_len = 0;
388                 return 0;
389         }
390
391         return 1;
392 }
393
394 static void send_file_entry(int f, const char *fname, struct file_struct *file,
395 #ifdef SUPPORT_LINKS
396                             const char *symlink_name, int symlink_len,
397 #endif
398                             int ndx, int first_ndx)
399 {
400         static time_t modtime;
401         static mode_t mode;
402 #ifdef SUPPORT_HARD_LINKS
403         static int64 dev;
404 #endif
405         static dev_t rdev;
406         static uint32 rdev_major;
407         static uid_t uid;
408         static gid_t gid;
409         static const char *user_name, *group_name;
410         static char lastname[MAXPATHLEN];
411 #ifdef SUPPORT_HARD_LINKS
412         int first_hlink_ndx = -1;
413 #endif
414         int l1, l2;
415         int xflags;
416
417         /* Initialize starting value of xflags and adjust counts. */
418         if (S_ISREG(file->mode))
419                 xflags = 0;
420         else if (S_ISDIR(file->mode)) {
421                 stats.num_dirs++;
422                 if (protocol_version >= 30) {
423                         if (file->flags & FLAG_CONTENT_DIR)
424                                 xflags = file->flags & FLAG_TOP_DIR;
425                         else if (file->flags & FLAG_IMPLIED_DIR)
426                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
427                         else
428                                 xflags = XMIT_NO_CONTENT_DIR;
429                 } else
430                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
431         } else {
432                 if (S_ISLNK(file->mode))
433                         stats.num_symlinks++;
434                 else if (IS_DEVICE(file->mode))
435                         stats.num_devices++;
436                 else if (IS_SPECIAL(file->mode))
437                         stats.num_specials++;
438                 xflags = 0;
439         }
440
441         if (file->mode == mode)
442                 xflags |= XMIT_SAME_MODE;
443         else
444                 mode = file->mode;
445
446         if (preserve_devices && IS_DEVICE(mode)) {
447                 if (protocol_version < 28) {
448                         if (tmp_rdev == rdev)
449                                 xflags |= XMIT_SAME_RDEV_pre28;
450                         else
451                                 rdev = tmp_rdev;
452                 } else {
453                         rdev = tmp_rdev;
454                         if ((uint32)major(rdev) == rdev_major)
455                                 xflags |= XMIT_SAME_RDEV_MAJOR;
456                         else
457                                 rdev_major = major(rdev);
458                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
459                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
460                 }
461         } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) {
462                 /* Special files don't need an rdev number, so just make
463                  * the historical transmission of the value efficient. */
464                 if (protocol_version < 28)
465                         xflags |= XMIT_SAME_RDEV_pre28;
466                 else {
467                         rdev = MAKEDEV(major(rdev), 0);
468                         xflags |= XMIT_SAME_RDEV_MAJOR;
469                         if (protocol_version < 30)
470                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
471                 }
472         } else if (protocol_version < 28)
473                 rdev = MAKEDEV(0, 0);
474         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
475                 xflags |= XMIT_SAME_UID;
476         else {
477                 uid = F_OWNER(file);
478                 if (!numeric_ids) {
479                         user_name = add_uid(uid);
480                         if (inc_recurse && user_name)
481                                 xflags |= XMIT_USER_NAME_FOLLOWS;
482                 }
483         }
484         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
485                 xflags |= XMIT_SAME_GID;
486         else {
487                 gid = F_GROUP(file);
488                 if (!numeric_ids) {
489                         group_name = add_gid(gid);
490                         if (inc_recurse && group_name)
491                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
492                 }
493         }
494         if (file->modtime == modtime)
495                 xflags |= XMIT_SAME_TIME;
496         else
497                 modtime = file->modtime;
498         if (NSEC_BUMP(file) && protocol_version >= 31)
499                 xflags |= XMIT_MOD_NSEC;
500
501 #ifdef SUPPORT_HARD_LINKS
502         if (tmp_dev != -1) {
503                 if (protocol_version >= 30) {
504                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
505                         first_hlink_ndx = (int32)(long)np->data - 1;
506                         if (first_hlink_ndx < 0) {
507                                 np->data = (void*)(long)(first_ndx + ndx + 1);
508                                 xflags |= XMIT_HLINK_FIRST;
509                         }
510                         if (DEBUG_GTE(HLINK, 1)) {
511                                 if (first_hlink_ndx >= 0) {
512                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
513                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
514                                                 first_hlink_ndx >= first_ndx ? "" : "un");
515                                 } else if (DEBUG_GTE(HLINK, 3)) {
516                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
517                                                 who_am_i(), first_ndx + ndx,
518                                                 big_num(tmp_dev), big_num(tmp_ino));
519                                 }
520                         }
521                 } else {
522                         if (tmp_dev == dev) {
523                                 if (protocol_version >= 28)
524                                         xflags |= XMIT_SAME_DEV_pre30;
525                         } else
526                                 dev = tmp_dev;
527                 }
528                 xflags |= XMIT_HLINKED;
529         }
530 #endif
531
532         for (l1 = 0;
533             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
534             l1++) {}
535         l2 = strlen(fname+l1);
536
537         if (l1 > 0)
538                 xflags |= XMIT_SAME_NAME;
539         if (l2 > 255)
540                 xflags |= XMIT_LONG_NAME;
541
542         /* We must make sure we don't send a zero flag byte or the
543          * other end will terminate the flist transfer.  Note that
544          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
545          * it's harmless way to add a bit to the first flag byte. */
546         if (protocol_version >= 28) {
547                 if (!xflags && !S_ISDIR(mode))
548                         xflags |= XMIT_TOP_DIR;
549                 if ((xflags & 0xFF00) || !xflags) {
550                         xflags |= XMIT_EXTENDED_FLAGS;
551                         write_shortint(f, xflags);
552                 } else
553                         write_byte(f, xflags);
554         } else {
555                 if (!(xflags & 0xFF))
556                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
557                 write_byte(f, xflags);
558         }
559         if (xflags & XMIT_SAME_NAME)
560                 write_byte(f, l1);
561         if (xflags & XMIT_LONG_NAME)
562                 write_varint30(f, l2);
563         else
564                 write_byte(f, l2);
565         write_buf(f, fname + l1, l2);
566
567 #ifdef SUPPORT_HARD_LINKS
568         if (first_hlink_ndx >= 0) {
569                 write_varint(f, first_hlink_ndx);
570                 if (first_hlink_ndx >= first_ndx)
571                         goto the_end;
572         }
573 #endif
574
575         write_varlong30(f, F_LENGTH(file), 3);
576         if (!(xflags & XMIT_SAME_TIME)) {
577                 if (protocol_version >= 30)
578                         write_varlong(f, modtime, 4);
579                 else
580                         write_int(f, modtime);
581         }
582         if (xflags & XMIT_MOD_NSEC)
583                 write_varint(f, F_MOD_NSEC(file));
584         if (!(xflags & XMIT_SAME_MODE))
585                 write_int(f, to_wire_mode(mode));
586         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
587                 if (protocol_version < 30)
588                         write_int(f, uid);
589                 else {
590                         write_varint(f, uid);
591                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
592                                 int len = strlen(user_name);
593                                 write_byte(f, len);
594                                 write_buf(f, user_name, len);
595                         }
596                 }
597         }
598         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
599                 if (protocol_version < 30)
600                         write_int(f, gid);
601                 else {
602                         write_varint(f, gid);
603                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
604                                 int len = strlen(group_name);
605                                 write_byte(f, len);
606                                 write_buf(f, group_name, len);
607                         }
608                 }
609         }
610         if ((preserve_devices && IS_DEVICE(mode))
611          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
612                 if (protocol_version < 28) {
613                         if (!(xflags & XMIT_SAME_RDEV_pre28))
614                                 write_int(f, (int)rdev);
615                 } else {
616                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
617                                 write_varint30(f, major(rdev));
618                         if (protocol_version >= 30)
619                                 write_varint(f, minor(rdev));
620                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
621                                 write_byte(f, minor(rdev));
622                         else
623                                 write_int(f, minor(rdev));
624                 }
625         }
626
627 #ifdef SUPPORT_LINKS
628         if (symlink_len) {
629                 write_varint30(f, symlink_len);
630                 write_buf(f, symlink_name, symlink_len);
631         }
632 #endif
633
634 #ifdef SUPPORT_HARD_LINKS
635         if (tmp_dev != -1 && protocol_version < 30) {
636                 /* Older protocols expect the dev number to be transmitted
637                  * 1-incremented so that it is never zero. */
638                 if (protocol_version < 26) {
639                         /* 32-bit dev_t and ino_t */
640                         write_int(f, (int32)(dev+1));
641                         write_int(f, (int32)tmp_ino);
642                 } else {
643                         /* 64-bit dev_t and ino_t */
644                         if (!(xflags & XMIT_SAME_DEV_pre30))
645                                 write_longint(f, dev+1);
646                         write_longint(f, tmp_ino);
647                 }
648         }
649 #endif
650
651         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
652                 const char *sum;
653                 if (S_ISREG(mode))
654                         sum = tmp_sum;
655                 else {
656                         /* Prior to 28, we sent a useless set of nulls. */
657                         sum = empty_sum;
658                 }
659                 write_buf(f, sum, checksum_len);
660         }
661
662 #ifdef SUPPORT_HARD_LINKS
663   the_end:
664 #endif
665         strlcpy(lastname, fname, MAXPATHLEN);
666
667         if (S_ISREG(mode) || S_ISLNK(mode))
668                 stats.total_size += F_LENGTH(file);
669 }
670
671 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
672 {
673         static int64 modtime;
674         static mode_t mode;
675 #ifdef SUPPORT_HARD_LINKS
676         static int64 dev;
677 #endif
678         static dev_t rdev;
679         static uint32 rdev_major;
680         static uid_t uid;
681         static gid_t gid;
682         static uint16 gid_flags;
683         static char lastname[MAXPATHLEN], *lastdir;
684         static int lastdir_depth, lastdir_len = -1;
685         static unsigned int del_hier_name_len = 0;
686         static int in_del_hier = 0;
687         char thisname[MAXPATHLEN];
688         unsigned int l1 = 0, l2 = 0;
689         int alloc_len, basename_len, linkname_len;
690         int extra_len = file_extra_cnt * EXTRA_LEN;
691         int first_hlink_ndx = -1;
692         int64 file_length;
693         uint32 modtime_nsec;
694         const char *basename;
695         struct file_struct *file;
696         alloc_pool_t *pool;
697         char *bp;
698
699         if (xflags & XMIT_SAME_NAME)
700                 l1 = read_byte(f);
701
702         if (xflags & XMIT_LONG_NAME)
703                 l2 = read_varint30(f);
704         else
705                 l2 = read_byte(f);
706
707         if (l2 >= MAXPATHLEN - l1) {
708                 rprintf(FERROR,
709                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
710                         xflags, l1, l2, lastname, who_am_i());
711                 overflow_exit("recv_file_entry");
712         }
713
714         strlcpy(thisname, lastname, l1 + 1);
715         read_sbuf(f, &thisname[l1], l2);
716         thisname[l1 + l2] = 0;
717
718         /* Abuse basename_len for a moment... */
719         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
720
721 #ifdef ICONV_OPTION
722         if (ic_recv != (iconv_t)-1) {
723                 xbuf outbuf, inbuf;
724
725                 INIT_CONST_XBUF(outbuf, thisname);
726                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
727
728                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
729                         io_error |= IOERR_GENERAL;
730                         rprintf(FERROR_UTF8,
731                             "[%s] cannot convert filename: %s (%s)\n",
732                             who_am_i(), lastname, strerror(errno));
733                         outbuf.len = 0;
734                 }
735                 thisname[outbuf.len] = '\0';
736         }
737 #endif
738
739         if (*thisname)
740                 clean_fname(thisname, 0);
741
742         if (sanitize_paths)
743                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
744
745         if ((basename = strrchr(thisname, '/')) != NULL) {
746                 int len = basename++ - thisname;
747                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
748                         lastdir = new_array(char, len + 1);
749                         memcpy(lastdir, thisname, len);
750                         lastdir[len] = '\0';
751                         lastdir_len = len;
752                         lastdir_depth = count_dir_elements(lastdir);
753                 }
754         } else
755                 basename = thisname;
756         basename_len = strlen(basename) + 1; /* count the '\0' */
757
758 #ifdef SUPPORT_HARD_LINKS
759         if (protocol_version >= 30
760          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
761                 first_hlink_ndx = read_varint(f);
762                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
763                         rprintf(FERROR,
764                                 "hard-link reference out of range: %d (%d)\n",
765                                 first_hlink_ndx, flist->ndx_start + flist->used);
766                         exit_cleanup(RERR_PROTOCOL);
767                 }
768                 if (DEBUG_GTE(HLINK, 1)) {
769                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
770                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
771                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
772                 }
773                 if (first_hlink_ndx >= flist->ndx_start) {
774                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
775                         file_length = F_LENGTH(first);
776                         modtime = first->modtime;
777                         modtime_nsec = F_MOD_NSEC(first);
778                         mode = first->mode;
779                         if (preserve_uid)
780                                 uid = F_OWNER(first);
781                         if (preserve_gid)
782                                 gid = F_GROUP(first);
783                         if (preserve_devices && IS_DEVICE(mode)) {
784                                 uint32 *devp = F_RDEV_P(first);
785                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
786                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
787                         }
788                         if (preserve_links && S_ISLNK(mode))
789                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
790                         else
791                                 linkname_len = 0;
792                         goto create_object;
793                 }
794         }
795 #endif
796
797         file_length = read_varlong30(f, 3);
798         if (!(xflags & XMIT_SAME_TIME)) {
799                 if (protocol_version >= 30) {
800                         modtime = read_varlong(f, 4);
801 #if SIZEOF_TIME_T < SIZEOF_INT64
802                         if (!am_generator && (int64)(time_t)modtime != modtime) {
803                                 rprintf(FERROR_XFER,
804                                     "Time value of %s truncated on receiver.\n",
805                                     lastname);
806                         }
807 #endif
808                 } else
809                         modtime = read_int(f);
810         }
811         if (xflags & XMIT_MOD_NSEC)
812                 modtime_nsec = read_varint(f);
813         else
814                 modtime_nsec = 0;
815         if (!(xflags & XMIT_SAME_MODE))
816                 mode = from_wire_mode(read_int(f));
817
818         if (chmod_modes && !S_ISLNK(mode) && mode)
819                 mode = tweak_mode(mode, chmod_modes);
820
821         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
822                 if (protocol_version < 30)
823                         uid = (uid_t)read_int(f);
824                 else {
825                         uid = (uid_t)read_varint(f);
826                         if (xflags & XMIT_USER_NAME_FOLLOWS)
827                                 uid = recv_user_name(f, uid);
828                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
829                                 uid = match_uid(uid);
830                 }
831         }
832         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
833                 if (protocol_version < 30)
834                         gid = (gid_t)read_int(f);
835                 else {
836                         gid = (gid_t)read_varint(f);
837                         gid_flags = 0;
838                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
839                                 gid = recv_group_name(f, gid, &gid_flags);
840                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
841                                 gid = match_gid(gid, &gid_flags);
842                 }
843         }
844
845         if ((preserve_devices && IS_DEVICE(mode))
846          || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) {
847                 if (protocol_version < 28) {
848                         if (!(xflags & XMIT_SAME_RDEV_pre28))
849                                 rdev = (dev_t)read_int(f);
850                 } else {
851                         uint32 rdev_minor;
852                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
853                                 rdev_major = read_varint30(f);
854                         if (protocol_version >= 30)
855                                 rdev_minor = read_varint(f);
856                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
857                                 rdev_minor = read_byte(f);
858                         else
859                                 rdev_minor = read_int(f);
860                         rdev = MAKEDEV(rdev_major, rdev_minor);
861                 }
862                 if (IS_DEVICE(mode))
863                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
864                 file_length = 0;
865         } else if (protocol_version < 28)
866                 rdev = MAKEDEV(0, 0);
867
868 #ifdef SUPPORT_LINKS
869         if (preserve_links && S_ISLNK(mode)) {
870                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
871                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
872                         rprintf(FERROR, "overflow: linkname_len=%d\n",
873                                 linkname_len - 1);
874                         overflow_exit("recv_file_entry");
875                 }
876 #ifdef ICONV_OPTION
877                 /* We don't know how much extra room we need to convert
878                  * the as-yet-unread symlink data, so let's hope that a
879                  * double-size buffer is plenty. */
880                 if (sender_symlink_iconv)
881                         linkname_len *= 2;
882 #endif
883                 if (munge_symlinks)
884                         linkname_len += SYMLINK_PREFIX_LEN;
885         }
886         else
887 #endif
888                 linkname_len = 0;
889
890 #ifdef SUPPORT_HARD_LINKS
891   create_object:
892         if (preserve_hard_links) {
893                 if (protocol_version < 28 && S_ISREG(mode))
894                         xflags |= XMIT_HLINKED;
895                 if (xflags & XMIT_HLINKED)
896                         extra_len += (inc_recurse+1) * EXTRA_LEN;
897         }
898 #endif
899
900 #ifdef SUPPORT_ACLS
901         /* Directories need an extra int32 for the default ACL. */
902         if (preserve_acls && S_ISDIR(mode))
903                 extra_len += EXTRA_LEN;
904 #endif
905
906         if (always_checksum && S_ISREG(mode))
907                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
908
909 #if SIZEOF_INT64 >= 8
910         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
911                 extra_len += EXTRA_LEN;
912 #endif
913 #ifdef HAVE_UTIMENSAT
914         if (modtime_nsec)
915                 extra_len += EXTRA_LEN;
916 #endif
917         if (file_length < 0) {
918                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
919                 exit_cleanup(RERR_UNSUPPORTED);
920         }
921
922         if (inc_recurse && S_ISDIR(mode)) {
923                 if (one_file_system) {
924                         /* Room to save the dir's device for -x */
925                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
926                 }
927                 pool = dir_flist->file_pool;
928         } else
929                 pool = flist->file_pool;
930
931 #if EXTRA_ROUNDING > 0
932         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
933                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
934 #endif
935
936         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
937                   + linkname_len;
938         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
939
940         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
941         bp += extra_len;
942         file = (struct file_struct *)bp;
943         bp += FILE_STRUCT_LEN;
944
945         memcpy(bp, basename, basename_len);
946
947 #ifdef SUPPORT_HARD_LINKS
948         if (xflags & XMIT_HLINKED)
949                 file->flags |= FLAG_HLINKED;
950 #endif
951         file->modtime = (time_t)modtime;
952 #ifdef HAVE_UTIMENSAT
953         if (modtime_nsec) {
954                 file->flags |= FLAG_MOD_NSEC;
955                 OPT_EXTRA(file, 0)->unum = modtime_nsec;
956         }
957 #endif
958         file->len32 = (uint32)file_length;
959 #if SIZEOF_INT64 >= 8
960         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
961 #if SIZEOF_CAPITAL_OFF_T < 8
962                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
963                 exit_cleanup(RERR_UNSUPPORTED);
964 #else
965                 file->flags |= FLAG_LENGTH64;
966                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(file_length >> 32);
967 #endif
968         }
969 #endif
970         file->mode = mode;
971         if (preserve_uid)
972                 F_OWNER(file) = uid;
973         if (preserve_gid) {
974                 F_GROUP(file) = gid;
975                 file->flags |= gid_flags;
976         }
977         if (unsort_ndx)
978                 F_NDX(file) = flist->used + flist->ndx_start;
979
980         if (basename != thisname) {
981                 file->dirname = lastdir;
982                 F_DEPTH(file) = lastdir_depth + 1;
983         } else
984                 F_DEPTH(file) = 1;
985
986         if (S_ISDIR(mode)) {
987                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
988                         F_DEPTH(file)--;
989                 if (protocol_version >= 30) {
990                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
991                                 if (xflags & XMIT_TOP_DIR)
992                                         file->flags |= FLAG_TOP_DIR;
993                                 file->flags |= FLAG_CONTENT_DIR;
994                         } else if (xflags & XMIT_TOP_DIR)
995                                 file->flags |= FLAG_IMPLIED_DIR;
996                 } else if (xflags & XMIT_TOP_DIR) {
997                         in_del_hier = recurse;
998                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
999                         if (relative_paths && del_hier_name_len > 2
1000                             && lastname[del_hier_name_len-1] == '.'
1001                             && lastname[del_hier_name_len-2] == '/')
1002                                 del_hier_name_len -= 2;
1003                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
1004                 } else if (in_del_hier) {
1005                         if (!relative_paths || !del_hier_name_len
1006                          || (l1 >= del_hier_name_len
1007                           && lastname[del_hier_name_len] == '/'))
1008                                 file->flags |= FLAG_CONTENT_DIR;
1009                         else
1010                                 in_del_hier = 0;
1011                 }
1012         }
1013
1014         if (preserve_devices && IS_DEVICE(mode)) {
1015                 uint32 *devp = F_RDEV_P(file);
1016                 DEV_MAJOR(devp) = major(rdev);
1017                 DEV_MINOR(devp) = minor(rdev);
1018         }
1019
1020 #ifdef SUPPORT_LINKS
1021         if (linkname_len) {
1022                 bp += basename_len;
1023                 if (first_hlink_ndx >= flist->ndx_start) {
1024                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1025                         memcpy(bp, F_SYMLINK(first), linkname_len);
1026                 } else {
1027                         if (munge_symlinks) {
1028                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
1029                                 bp += SYMLINK_PREFIX_LEN;
1030                                 linkname_len -= SYMLINK_PREFIX_LEN;
1031                         }
1032 #ifdef ICONV_OPTION
1033                         if (sender_symlink_iconv) {
1034                                 xbuf outbuf, inbuf;
1035
1036                                 alloc_len = linkname_len;
1037                                 linkname_len /= 2;
1038
1039                                 /* Read the symlink data into the end of our double-sized
1040                                  * buffer and then convert it into the right spot. */
1041                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1042                                           linkname_len - 1, (size_t)-1);
1043                                 read_sbuf(f, inbuf.buf, inbuf.len);
1044                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1045
1046                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) {
1047                                         io_error |= IOERR_GENERAL;
1048                                         rprintf(FERROR_XFER,
1049                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1050                                             who_am_i(), full_fname(thisname), strerror(errno));
1051                                         bp = (char*)file->basename;
1052                                         *bp++ = '\0';
1053                                         outbuf.len = 0;
1054                                 }
1055                                 bp[outbuf.len] = '\0';
1056                         } else
1057 #endif
1058                                 read_sbuf(f, bp, linkname_len - 1);
1059                         if (sanitize_paths && !munge_symlinks && *bp)
1060                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1061                 }
1062         }
1063 #endif
1064
1065 #ifdef SUPPORT_HARD_LINKS
1066         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1067                 if (protocol_version >= 30) {
1068                         if (xflags & XMIT_HLINK_FIRST) {
1069                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1070                         } else
1071                                 F_HL_GNUM(file) = first_hlink_ndx;
1072                 } else {
1073                         static int32 cnt = 0;
1074                         struct ht_int64_node *np;
1075                         int64 ino;
1076                         int32 ndx;
1077                         if (protocol_version < 26) {
1078                                 dev = read_int(f);
1079                                 ino = read_int(f);
1080                         } else {
1081                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1082                                         dev = read_longint(f);
1083                                 ino = read_longint(f);
1084                         }
1085                         np = idev_find(dev, ino);
1086                         ndx = (int32)(long)np->data - 1;
1087                         if (ndx < 0) {
1088                                 ndx = cnt++;
1089                                 np->data = (void*)(long)cnt;
1090                         }
1091                         F_HL_GNUM(file) = ndx;
1092                 }
1093         }
1094 #endif
1095
1096         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1097                 if (S_ISREG(mode))
1098                         bp = F_SUM(file);
1099                 else {
1100                         /* Prior to 28, we get a useless set of nulls. */
1101                         bp = tmp_sum;
1102                 }
1103                 if (first_hlink_ndx >= flist->ndx_start) {
1104                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1105                         memcpy(bp, F_SUM(first), checksum_len);
1106                 } else
1107                         read_buf(f, bp, checksum_len);
1108         }
1109
1110 #ifdef SUPPORT_ACLS
1111         if (preserve_acls && !S_ISLNK(mode))
1112                 receive_acl(f, file);
1113 #endif
1114 #ifdef SUPPORT_XATTRS
1115         if (preserve_xattrs)
1116                 receive_xattr(f, file);
1117 #endif
1118
1119         if (S_ISREG(mode) || S_ISLNK(mode))
1120                 stats.total_size += file_length;
1121
1122         return file;
1123 }
1124
1125 /* Create a file_struct for a named file by reading its stat() information
1126  * and performing extensive checks against global options.
1127  *
1128  * Returns a pointer to the new file struct, or NULL if there was an error
1129  * or this file should be excluded.
1130  *
1131  * Note: Any error (here or in send_file_name) that results in the omission of
1132  * an existent source file from the file list should set
1133  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1134  * destination if --delete is on. */
1135 struct file_struct *make_file(const char *fname, struct file_list *flist,
1136                               STRUCT_STAT *stp, int flags, int filter_level)
1137 {
1138         static char *lastdir;
1139         static int lastdir_len = -1;
1140         struct file_struct *file;
1141         char thisname[MAXPATHLEN];
1142         char linkname[MAXPATHLEN];
1143         int alloc_len, basename_len, linkname_len;
1144         int extra_len = file_extra_cnt * EXTRA_LEN;
1145         const char *basename;
1146         alloc_pool_t *pool;
1147         STRUCT_STAT st;
1148         char *bp;
1149
1150         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1151                 io_error |= IOERR_GENERAL;
1152                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1153                 return NULL;
1154         }
1155         clean_fname(thisname, 0);
1156         if (sanitize_paths)
1157                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1158
1159         if (stp && (S_ISDIR(stp->st_mode) || stp->st_mode == 0)) {
1160                 /* This is needed to handle a "symlink/." with a --relative
1161                  * dir, or a request to delete a specific file. */
1162                 st = *stp;
1163                 *linkname = '\0'; /* make IBM code checker happy */
1164         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1165                 int save_errno = errno;
1166                 /* See if file is excluded before reporting an error. */
1167                 if (filter_level != NO_FILTERS
1168                  && (is_excluded(thisname, 0, filter_level)
1169                   || is_excluded(thisname, 1, filter_level))) {
1170                         if (ignore_perishable && save_errno != ENOENT)
1171                                 non_perishable_cnt++;
1172                         return NULL;
1173                 }
1174                 if (save_errno == ENOENT) {
1175 #ifdef SUPPORT_LINKS
1176                         /* When our options tell us to follow a symlink that
1177                          * points nowhere, tell the user about the symlink
1178                          * instead of giving a "vanished" message.  We only
1179                          * dereference a symlink if one of the --copy*links
1180                          * options was specified, so there's no need for the
1181                          * extra lstat() if one of these options isn't on. */
1182                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1183                          && x_lstat(thisname, &st, NULL) == 0
1184                          && S_ISLNK(st.st_mode)) {
1185                                 io_error |= IOERR_GENERAL;
1186                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1187                                         full_fname(thisname));
1188                         } else
1189 #endif
1190                         {
1191                                 enum logcode c = am_daemon && protocol_version < 28
1192                                                ? FERROR : FWARNING;
1193                                 io_error |= IOERR_VANISHED;
1194                                 rprintf(c, "file has vanished: %s\n",
1195                                         full_fname(thisname));
1196                         }
1197                 } else {
1198                         io_error |= IOERR_GENERAL;
1199                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1200                                 full_fname(thisname));
1201                 }
1202                 return NULL;
1203         } else if (st.st_mode == 0) {
1204                 io_error |= IOERR_GENERAL;
1205                 rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n",
1206                         full_fname(thisname));
1207                 return NULL;
1208         }
1209
1210         if (filter_level == NO_FILTERS)
1211                 goto skip_filters;
1212
1213         if (S_ISDIR(st.st_mode)) {
1214                 if (!xfer_dirs) {
1215                         rprintf(FINFO, "skipping directory %s\n", thisname);
1216                         return NULL;
1217                 }
1218                 /* -x only affects dirs because we need to avoid recursing
1219                  * into a mount-point directory, not to avoid copying a
1220                  * symlinked file if -L (or similar) was specified. */
1221                 if (one_file_system && st.st_dev != filesystem_dev
1222                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1223                         if (one_file_system > 1) {
1224                                 if (INFO_GTE(MOUNT, 1)) {
1225                                         rprintf(FINFO,
1226                                             "[%s] skipping mount-point dir %s\n",
1227                                             who_am_i(), thisname);
1228                                 }
1229                                 return NULL;
1230                         }
1231                         flags |= FLAG_MOUNT_DIR;
1232                         flags &= ~FLAG_CONTENT_DIR;
1233                 }
1234         } else
1235                 flags &= ~FLAG_CONTENT_DIR;
1236
1237         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1238                 if (ignore_perishable)
1239                         non_perishable_cnt++;
1240                 return NULL;
1241         }
1242
1243         if (lp_ignore_nonreadable(module_id)) {
1244 #ifdef SUPPORT_LINKS
1245                 if (!S_ISLNK(st.st_mode))
1246 #endif
1247                         if (access(thisname, R_OK) != 0)
1248                                 return NULL;
1249         }
1250
1251   skip_filters:
1252
1253         /* Only divert a directory in the main transfer. */
1254         if (flist) {
1255                 if (flist->prev && S_ISDIR(st.st_mode)
1256                  && flags & FLAG_DIVERT_DIRS) {
1257                         /* Room for parent/sibling/next-child info. */
1258                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1259                         if (relative_paths)
1260                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1261                         pool = dir_flist->file_pool;
1262                 } else
1263                         pool = flist->file_pool;
1264         } else {
1265 #ifdef SUPPORT_ACLS
1266                 /* Directories need an extra int32 for the default ACL. */
1267                 if (preserve_acls && S_ISDIR(st.st_mode))
1268                         extra_len += EXTRA_LEN;
1269 #endif
1270                 pool = NULL;
1271         }
1272
1273         if (DEBUG_GTE(FLIST, 2)) {
1274                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1275                         who_am_i(), thisname, filter_level);
1276         }
1277
1278         if ((basename = strrchr(thisname, '/')) != NULL) {
1279                 int len = basename++ - thisname;
1280                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1281                         lastdir = new_array(char, len + 1);
1282                         memcpy(lastdir, thisname, len);
1283                         lastdir[len] = '\0';
1284                         lastdir_len = len;
1285                 }
1286         } else
1287                 basename = thisname;
1288         basename_len = strlen(basename) + 1; /* count the '\0' */
1289
1290 #ifdef SUPPORT_LINKS
1291         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1292 #else
1293         linkname_len = 0;
1294 #endif
1295
1296 #ifdef ST_MTIME_NSEC
1297         if (st.ST_MTIME_NSEC && protocol_version >= 31)
1298                 extra_len += EXTRA_LEN;
1299 #endif
1300 #if SIZEOF_CAPITAL_OFF_T >= 8
1301         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1302                 extra_len += EXTRA_LEN;
1303 #endif
1304
1305         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1306                 file_checksum(thisname, tmp_sum, st.st_size);
1307                 if (sender_keeps_checksum)
1308                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1309         }
1310
1311 #if EXTRA_ROUNDING > 0
1312         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1313                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1314 #endif
1315
1316         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1317                   + linkname_len;
1318         if (pool)
1319                 bp = pool_alloc(pool, alloc_len, "make_file");
1320         else {
1321                 if (!(bp = new_array(char, alloc_len)))
1322                         out_of_memory("make_file");
1323         }
1324
1325         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1326         bp += extra_len;
1327         file = (struct file_struct *)bp;
1328         bp += FILE_STRUCT_LEN;
1329
1330         memcpy(bp, basename, basename_len);
1331
1332 #ifdef SUPPORT_HARD_LINKS
1333         if (preserve_hard_links && flist && flist->prev) {
1334                 if (protocol_version >= 28
1335                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1336                  : S_ISREG(st.st_mode)) {
1337                         tmp_dev = (int64)st.st_dev;
1338                         tmp_ino = (int64)st.st_ino;
1339                 } else
1340                         tmp_dev = -1;
1341         }
1342 #endif
1343
1344 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1345         if (IS_DEVICE(st.st_mode)) {
1346                 tmp_rdev = st.st_rdev;
1347                 st.st_size = 0;
1348         } else if (IS_SPECIAL(st.st_mode))
1349                 st.st_size = 0;
1350 #endif
1351
1352         file->flags = flags;
1353         file->modtime = st.st_mtime;
1354 #ifdef ST_MTIME_NSEC
1355         if (st.ST_MTIME_NSEC && protocol_version >= 31) {
1356                 file->flags |= FLAG_MOD_NSEC;
1357                 OPT_EXTRA(file, 0)->unum = st.ST_MTIME_NSEC;
1358         }
1359 #endif
1360         file->len32 = (uint32)st.st_size;
1361 #if SIZEOF_CAPITAL_OFF_T >= 8
1362         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1363                 file->flags |= FLAG_LENGTH64;
1364                 OPT_EXTRA(file, NSEC_BUMP(file))->unum = (uint32)(st.st_size >> 32);
1365         }
1366 #endif
1367         file->mode = st.st_mode;
1368         if (preserve_uid)
1369                 F_OWNER(file) = st.st_uid;
1370         if (preserve_gid)
1371                 F_GROUP(file) = st.st_gid;
1372         if (am_generator && st.st_uid == our_uid)
1373                 file->flags |= FLAG_OWNED_BY_US;
1374
1375         if (basename != thisname)
1376                 file->dirname = lastdir;
1377
1378 #ifdef SUPPORT_LINKS
1379         if (linkname_len)
1380                 memcpy(bp + basename_len, linkname, linkname_len);
1381 #endif
1382
1383         if (am_sender)
1384                 F_PATHNAME(file) = pathname;
1385         else if (!pool)
1386                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1387
1388         if (basename_len == 0+1) {
1389                 if (!pool)
1390                         unmake_file(file);
1391                 return NULL;
1392         }
1393
1394         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1395                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1396
1397         if (unsort_ndx)
1398                 F_NDX(file) = stats.num_dirs;
1399
1400         return file;
1401 }
1402
1403 /* Only called for temporary file_struct entries created by make_file(). */
1404 void unmake_file(struct file_struct *file)
1405 {
1406         free(REQ_EXTRA(file, F_DEPTH(file)));
1407 }
1408
1409 static struct file_struct *send_file_name(int f, struct file_list *flist,
1410                                           const char *fname, STRUCT_STAT *stp,
1411                                           int flags, int filter_level)
1412 {
1413         struct file_struct *file;
1414
1415         file = make_file(fname, flist, stp, flags, filter_level);
1416         if (!file)
1417                 return NULL;
1418
1419         if (chmod_modes && !S_ISLNK(file->mode) && file->mode)
1420                 file->mode = tweak_mode(file->mode, chmod_modes);
1421
1422         if (f >= 0) {
1423                 char fbuf[MAXPATHLEN];
1424 #ifdef SUPPORT_LINKS
1425                 const char *symlink_name;
1426                 int symlink_len;
1427 #ifdef ICONV_OPTION
1428                 char symlink_buf[MAXPATHLEN];
1429 #endif
1430 #endif
1431 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1432                 stat_x sx;
1433                 init_stat_x(&sx);
1434 #endif
1435
1436 #ifdef SUPPORT_LINKS
1437                 if (preserve_links && S_ISLNK(file->mode)) {
1438                         symlink_name = F_SYMLINK(file);
1439                         symlink_len = strlen(symlink_name);
1440                         if (symlink_len == 0) {
1441                                 io_error |= IOERR_GENERAL;
1442                                 f_name(file, fbuf);
1443                                 rprintf(FERROR_XFER,
1444                                     "skipping symlink with 0-length value: %s\n",
1445                                     full_fname(fbuf));
1446                                 return NULL;
1447                         }
1448                 } else {
1449                         symlink_name = NULL;
1450                         symlink_len = 0;
1451                 }
1452 #endif
1453
1454 #ifdef ICONV_OPTION
1455                 if (ic_send != (iconv_t)-1) {
1456                         xbuf outbuf, inbuf;
1457
1458                         INIT_CONST_XBUF(outbuf, fbuf);
1459
1460                         if (file->dirname) {
1461                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1462                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1463                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0)
1464                                         goto convert_error;
1465                                 outbuf.size += 2;
1466                                 fbuf[outbuf.len++] = '/';
1467                         }
1468
1469                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1470                         if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1471                           convert_error:
1472                                 io_error |= IOERR_GENERAL;
1473                                 rprintf(FERROR_XFER,
1474                                     "[%s] cannot convert filename: %s (%s)\n",
1475                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1476                                 return NULL;
1477                         }
1478                         fbuf[outbuf.len] = '\0';
1479
1480 #ifdef SUPPORT_LINKS
1481                         if (symlink_len && sender_symlink_iconv) {
1482                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1483                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1484                                 if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) {
1485                                         io_error |= IOERR_GENERAL;
1486                                         f_name(file, fbuf);
1487                                         rprintf(FERROR_XFER,
1488                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1489                                             who_am_i(), full_fname(fbuf), strerror(errno));
1490                                         return NULL;
1491                                 }
1492                                 symlink_buf[outbuf.len] = '\0';
1493
1494                                 symlink_name = symlink_buf;
1495                                 symlink_len = outbuf.len;
1496                         }
1497 #endif
1498                 } else
1499 #endif
1500                         f_name(file, fbuf);
1501
1502 #ifdef SUPPORT_ACLS
1503                 if (preserve_acls && !S_ISLNK(file->mode)) {
1504                         sx.st.st_mode = file->mode;
1505                         if (get_acl(fname, &sx) < 0) {
1506                                 io_error |= IOERR_GENERAL;
1507                                 return NULL;
1508                         }
1509                 }
1510 #endif
1511 #ifdef SUPPORT_XATTRS
1512                 if (preserve_xattrs) {
1513                         sx.st.st_mode = file->mode;
1514                         if (get_xattr(fname, &sx) < 0) {
1515                                 io_error |= IOERR_GENERAL;
1516                                 return NULL;
1517                         }
1518                 }
1519 #endif
1520
1521                 send_file_entry(f, fbuf, file,
1522 #ifdef SUPPORT_LINKS
1523                                 symlink_name, symlink_len,
1524 #endif
1525                                 flist->used, flist->ndx_start);
1526
1527 #ifdef SUPPORT_ACLS
1528                 if (preserve_acls && !S_ISLNK(file->mode)) {
1529                         send_acl(f, &sx);
1530                         free_acl(&sx);
1531                 }
1532 #endif
1533 #ifdef SUPPORT_XATTRS
1534                 if (preserve_xattrs) {
1535                         F_XATTR(file) = send_xattr(f, &sx);
1536                         free_xattr(&sx);
1537                 }
1538 #endif
1539         }
1540
1541         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1542
1543         flist_expand(flist, 1);
1544         flist->files[flist->used++] = file;
1545
1546         return file;
1547 }
1548
1549 static void send_if_directory(int f, struct file_list *flist,
1550                               struct file_struct *file,
1551                               char *fbuf, unsigned int ol,
1552                               int flags)
1553 {
1554         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1555
1556         if (S_ISDIR(file->mode)
1557             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1558                 void *save_filters;
1559                 unsigned int len = strlen(fbuf);
1560                 if (len > 1 && fbuf[len-1] == '/')
1561                         fbuf[--len] = '\0';
1562                 save_filters = push_local_filters(fbuf, len);
1563                 send_directory(f, flist, fbuf, len, flags);
1564                 pop_local_filters(save_filters);
1565                 fbuf[ol] = '\0';
1566                 if (is_dot_dir)
1567                         fbuf[ol-1] = '.';
1568         }
1569 }
1570
1571 static int file_compare(const void *file1, const void *file2)
1572 {
1573         return f_name_cmp(*(struct file_struct **)file1,
1574                           *(struct file_struct **)file2);
1575 }
1576
1577 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1578  * version, but I (Wayne) changed the merge code to do less copying and
1579  * to require only half the amount of temporary memory. */
1580 static void fsort_tmp(struct file_struct **fp, size_t num,
1581                       struct file_struct **tmp)
1582 {
1583         struct file_struct **f1, **f2, **t;
1584         size_t n1, n2;
1585
1586         n1 = num / 2;
1587         n2 = num - n1;
1588         f1 = fp;
1589         f2 = fp + n1;
1590
1591         if (n1 > 1)
1592                 fsort_tmp(f1, n1, tmp);
1593         if (n2 > 1)
1594                 fsort_tmp(f2, n2, tmp);
1595
1596         while (f_name_cmp(*f1, *f2) <= 0) {
1597                 if (!--n1)
1598                         return;
1599                 f1++;
1600         }
1601
1602         t = tmp;
1603         memcpy(t, f1, n1 * PTR_SIZE);
1604
1605         *f1++ = *f2++, n2--;
1606
1607         while (n1 > 0 && n2 > 0) {
1608                 if (f_name_cmp(*t, *f2) <= 0)
1609                         *f1++ = *t++, n1--;
1610                 else
1611                         *f1++ = *f2++, n2--;
1612         }
1613
1614         if (n1 > 0)
1615                 memcpy(f1, t, n1 * PTR_SIZE);
1616 }
1617
1618 /* This file-struct sorting routine makes sure that any identical names in
1619  * the file list stay in the same order as they were in the original list.
1620  * This is particularly vital in inc_recurse mode where we expect a sort
1621  * on the flist to match the exact order of a sort on the dir_flist. */
1622 static void fsort(struct file_struct **fp, size_t num)
1623 {
1624         if (num <= 1)
1625                 return;
1626
1627         if (use_qsort)
1628                 qsort(fp, num, PTR_SIZE, file_compare);
1629         else {
1630                 struct file_struct **tmp = new_array(struct file_struct *,
1631                                                      (num+1) / 2);
1632                 fsort_tmp(fp, num, tmp);
1633                 free(tmp);
1634         }
1635 }
1636
1637 /* We take an entire set of sibling dirs from the sorted flist and link them
1638  * into the tree, setting the appropriate parent/child/sibling pointers. */
1639 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1640                              int dir_cnt)
1641 {
1642         int i;
1643         int32 *dp = NULL;
1644         int32 *parent_dp = parent_ndx < 0 ? NULL
1645                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1646
1647         flist_expand(dir_flist, dir_cnt);
1648         dir_flist->sorted = dir_flist->files;
1649
1650         for (i = 0; dir_cnt; i++) {
1651                 struct file_struct *file = from_flist->sorted[i];
1652
1653                 if (!S_ISDIR(file->mode))
1654                         continue;
1655
1656                 dir_flist->files[dir_flist->used++] = file;
1657                 dir_cnt--;
1658
1659                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1660                         continue;
1661
1662                 if (dp)
1663                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1664                 else if (parent_dp)
1665                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1666                 else
1667                         send_dir_ndx = dir_flist->used - 1;
1668
1669                 dp = F_DIR_NODE_P(file);
1670                 DIR_PARENT(dp) = parent_ndx;
1671                 DIR_FIRST_CHILD(dp) = -1;
1672         }
1673         if (dp)
1674                 DIR_NEXT_SIBLING(dp) = -1;
1675 }
1676
1677 static void interpret_stat_error(const char *fname, int is_dir)
1678 {
1679         if (errno == ENOENT) {
1680                 io_error |= IOERR_VANISHED;
1681                 rprintf(FWARNING, "%s has vanished: %s\n",
1682                         is_dir ? "directory" : "file", full_fname(fname));
1683         } else {
1684                 io_error |= IOERR_GENERAL;
1685                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1686                         full_fname(fname));
1687         }
1688 }
1689
1690 /* This function is normally called by the sender, but the receiving side also
1691  * calls it from get_dirlist() with f set to -1 so that we just construct the
1692  * file list in memory without sending it over the wire.  Also, get_dirlist()
1693  * might call this with f set to -2, which also indicates that local filter
1694  * rules should be ignored. */
1695 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1696                            int flags)
1697 {
1698         struct dirent *di;
1699         unsigned remainder;
1700         char *p;
1701         DIR *d;
1702         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1703         int start = flist->used;
1704         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1705
1706         assert(flist != NULL);
1707
1708         if (!(d = opendir(fbuf))) {
1709                 if (errno == ENOENT) {
1710                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1711                                 interpret_stat_error(fbuf, True);
1712                         return;
1713                 }
1714                 io_error |= IOERR_GENERAL;
1715                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1716                 return;
1717         }
1718
1719         p = fbuf + len;
1720         if (len == 1 && *fbuf == '/')
1721                 remainder = MAXPATHLEN - 1;
1722         else if (len < MAXPATHLEN-1) {
1723                 *p++ = '/';
1724                 *p = '\0';
1725                 remainder = MAXPATHLEN - (len + 1);
1726         } else
1727                 remainder = 0;
1728
1729         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1730                 unsigned name_len;
1731                 char *dname = d_name(di);
1732                 if (dname[0] == '.' && (dname[1] == '\0'
1733                     || (dname[1] == '.' && dname[2] == '\0')))
1734                         continue;
1735                 name_len = strlcpy(p, dname, remainder);
1736                 if (name_len >= remainder) {
1737                         char save = fbuf[len];
1738                         fbuf[len] = '\0';
1739                         io_error |= IOERR_GENERAL;
1740                         rprintf(FERROR_XFER,
1741                                 "filename overflows max-path len by %u: %s/%s\n",
1742                                 name_len - remainder + 1, fbuf, dname);
1743                         fbuf[len] = save;
1744                         continue;
1745                 }
1746                 if (dname[0] == '\0') {
1747                         io_error |= IOERR_GENERAL;
1748                         rprintf(FERROR_XFER,
1749                                 "cannot send file with empty name in %s\n",
1750                                 full_fname(fbuf));
1751                         continue;
1752                 }
1753
1754                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1755         }
1756
1757         fbuf[len] = '\0';
1758
1759         if (errno) {
1760                 io_error |= IOERR_GENERAL;
1761                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1762         }
1763
1764         closedir(d);
1765
1766         if (f >= 0 && recurse && !divert_dirs) {
1767                 int i, end = flist->used - 1;
1768                 /* send_if_directory() bumps flist->used, so use "end". */
1769                 for (i = start; i <= end; i++)
1770                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1771         }
1772 }
1773
1774 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1775                               char *start, char *limit, int flags, char name_type)
1776 {
1777         static char lastpath[MAXPATHLEN] = "";
1778         static int lastpath_len = 0;
1779         static struct file_struct *lastpath_struct = NULL;
1780         struct file_struct *file;
1781         item_list *relname_list;
1782         relnamecache **rnpp;
1783         int len, need_new_dir, depth = 0;
1784         filter_rule_list save_filter_list = filter_list;
1785
1786         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1787         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1788
1789         if (inc_recurse) {
1790                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1791                  && lastpath_len == limit - fname
1792                  && strncmp(lastpath, fname, lastpath_len) == 0)
1793                         need_new_dir = 0;
1794                 else
1795                         need_new_dir = 1;
1796         } else {
1797                 char *tp = fname, *lp = lastpath;
1798                 /* Skip any initial directories in our path that we
1799                  * have in common with lastpath. */
1800                 assert(start == fname);
1801                 for ( ; ; tp++, lp++) {
1802                         if (tp == limit) {
1803                                 if (*lp == '/' || *lp == '\0')
1804                                         goto done;
1805                                 break;
1806                         }
1807                         if (*lp != *tp)
1808                                 break;
1809                         if (*tp == '/') {
1810                                 start = tp;
1811                                 depth++;
1812                         }
1813                 }
1814                 need_new_dir = 1;
1815         }
1816
1817         if (need_new_dir) {
1818                 int save_copy_links = copy_links;
1819                 int save_xfer_dirs = xfer_dirs;
1820                 char *slash;
1821
1822                 copy_links = xfer_dirs = 1;
1823
1824                 *limit = '\0';
1825
1826                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1827                         *slash = '\0';
1828                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1829                         depth++;
1830                         if (!inc_recurse && file && S_ISDIR(file->mode))
1831                                 change_local_filter_dir(fname, strlen(fname), depth);
1832                         *slash = '/';
1833                 }
1834
1835                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1836                 if (inc_recurse) {
1837                         if (file && !S_ISDIR(file->mode))
1838                                 file = NULL;
1839                         lastpath_struct = file;
1840                 } else if (file && S_ISDIR(file->mode))
1841                         change_local_filter_dir(fname, strlen(fname), ++depth);
1842
1843                 strlcpy(lastpath, fname, sizeof lastpath);
1844                 lastpath_len = limit - fname;
1845
1846                 *limit = '/';
1847
1848                 copy_links = save_copy_links;
1849                 xfer_dirs = save_xfer_dirs;
1850
1851                 if (!inc_recurse)
1852                         goto done;
1853         }
1854
1855         if (!lastpath_struct)
1856                 goto done; /* dir must have vanished */
1857
1858         len = strlen(limit+1);
1859         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1860         if (!relname_list) {
1861                 if (!(relname_list = new0(item_list)))
1862                         out_of_memory("send_implied_dirs");
1863                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1864         }
1865         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1866         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1867                 out_of_memory("send_implied_dirs");
1868         (*rnpp)->name_type = name_type;
1869         strlcpy((*rnpp)->fname, limit+1, len + 1);
1870
1871 done:
1872         filter_list = save_filter_list;
1873 }
1874
1875 static NORETURN void fatal_unsafe_io_error(void)
1876 {
1877         /* This (sadly) can only happen when pushing data because
1878          * the sender does not know about what kind of delete
1879          * is in effect on the receiving side when pulling. */
1880         rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-%s issue with a pre-3.0.7 receiver.\n",
1881                 delete_during == 2 ? "delay" : "during");
1882         exit_cleanup(RERR_UNSUPPORTED);
1883 }
1884
1885 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1886 {
1887         char fbuf[MAXPATHLEN];
1888         item_list *relname_list;
1889         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1890         size_t j;
1891
1892         f_name(file, fbuf);
1893         dlen = strlen(fbuf);
1894
1895         if (!change_pathname(file, NULL, 0))
1896                 exit_cleanup(RERR_FILESELECT);
1897
1898         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1899
1900         if (file->flags & FLAG_CONTENT_DIR) {
1901                 if (one_file_system) {
1902                         STRUCT_STAT st;
1903                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1904                                 interpret_stat_error(fbuf, True);
1905                                 return;
1906                         }
1907                         filesystem_dev = st.st_dev;
1908                 }
1909                 send_directory(f, flist, fbuf, dlen, flags);
1910         }
1911
1912         if (!relative_paths)
1913                 return;
1914
1915         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1916         if (!relname_list)
1917                 return;
1918
1919         for (j = 0; j < relname_list->count; j++) {
1920                 char *slash;
1921                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1922                 char name_type = rnp->name_type;
1923
1924                 fbuf[dlen] = '/';
1925                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1926                 free(rnp);
1927                 if (len >= (int)sizeof fbuf)
1928                         continue; /* Impossible... */
1929
1930                 slash = strchr(fbuf+dlen+1, '/');
1931                 if (slash) {
1932                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1933                         continue;
1934                 }
1935
1936                 if (name_type != NORMAL_NAME) {
1937                         STRUCT_STAT st;
1938                         if (name_type == MISSING_NAME)
1939                                 memset(&st, 0, sizeof st);
1940                         else if (link_stat(fbuf, &st, 1) != 0) {
1941                                 interpret_stat_error(fbuf, True);
1942                                 continue;
1943                         }
1944                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1945                 } else
1946                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1947         }
1948
1949         free(relname_list);
1950 }
1951
1952 void send_extra_file_list(int f, int at_least)
1953 {
1954         struct file_list *flist;
1955         int64 start_write;
1956         uint16 prev_flags;
1957         int save_io_error = io_error;
1958
1959         if (flist_eof)
1960                 return;
1961
1962         if (at_least < 0)
1963                 at_least = file_total - file_old_total + 1;
1964
1965         /* Keep sending data until we have the requested number of
1966          * files in the upcoming file-lists. */
1967         while (file_total - file_old_total < at_least) {
1968                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1969                 int dir_ndx, dstart = stats.num_dirs;
1970                 const char *pathname = F_PATHNAME(file);
1971                 int32 *dp;
1972
1973                 flist = flist_new(0, "send_extra_file_list");
1974                 start_write = stats.total_written;
1975
1976                 if (unsort_ndx)
1977                         dir_ndx = F_NDX(file);
1978                 else
1979                         dir_ndx = send_dir_ndx;
1980                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1981                 flist->parent_ndx = dir_ndx;
1982
1983                 send1extra(f, file, flist);
1984                 prev_flags = file->flags;
1985                 dp = F_DIR_NODE_P(file);
1986
1987                 /* If there are any duplicate directory names that follow, we
1988                  * send all the dirs together in one file-list.  The dir_flist
1989                  * tree links all the child subdirs onto the last dup dir. */
1990                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1991                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1992                         send_dir_ndx = dir_ndx;
1993                         file = dir_flist->sorted[dir_ndx];
1994                         /* Try to avoid some duplicate scanning of identical dirs. */
1995                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1996                                 file->flags &= ~FLAG_CONTENT_DIR;
1997                         send1extra(f, file, flist);
1998                         prev_flags = file->flags;
1999                         dp = F_DIR_NODE_P(file);
2000                 }
2001
2002                 if (io_error == save_io_error || ignore_errors)
2003                         write_byte(f, 0);
2004                 else if (use_safe_inc_flist) {
2005                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2006                         write_varint(f, io_error);
2007                 } else {
2008                         if (delete_during)
2009                                 fatal_unsafe_io_error();
2010                         write_byte(f, 0);
2011                 }
2012
2013                 if (need_unsorted_flist) {
2014                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2015                                 out_of_memory("send_extra_file_list");
2016                         memcpy(flist->sorted, flist->files,
2017                                flist->used * sizeof (struct file_struct*));
2018                 } else
2019                         flist->sorted = flist->files;
2020
2021                 flist_sort_and_clean(flist, 0);
2022
2023                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
2024                 flist_done_allocating(flist);
2025
2026                 file_total += flist->used;
2027                 stats.flist_size += stats.total_written - start_write;
2028                 stats.num_files += flist->used;
2029                 if (DEBUG_GTE(FLIST, 3))
2030                         output_flist(flist);
2031
2032                 if (DIR_FIRST_CHILD(dp) >= 0) {
2033                         send_dir_ndx = DIR_FIRST_CHILD(dp);
2034                         send_dir_depth++;
2035                 } else {
2036                         while (DIR_NEXT_SIBLING(dp) < 0) {
2037                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
2038                                         write_ndx(f, NDX_FLIST_EOF);
2039                                         flist_eof = 1;
2040                                         if (DEBUG_GTE(FLIST, 3))
2041                                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2042                                         change_local_filter_dir(NULL, 0, 0);
2043                                         goto finish;
2044                                 }
2045                                 send_dir_depth--;
2046                                 file = dir_flist->sorted[send_dir_ndx];
2047                                 dp = F_DIR_NODE_P(file);
2048                         }
2049                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
2050                 }
2051         }
2052
2053   finish:
2054         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
2055                 send_msg_int(MSG_IO_ERROR, io_error);
2056 }
2057
2058 struct file_list *send_file_list(int f, int argc, char *argv[])
2059 {
2060         static const char *lastdir;
2061         static int lastdir_len = -1;
2062         int len, dirlen;
2063         STRUCT_STAT st;
2064         char *p, *dir;
2065         struct file_list *flist;
2066         struct timeval start_tv, end_tv;
2067         int64 start_write;
2068         int use_ff_fd = 0;
2069         int disable_buffering, reenable_multiplex = -1;
2070         int flags = recurse ? FLAG_CONTENT_DIR : 0;
2071         int reading_remotely = filesfrom_host != NULL;
2072         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
2073 #ifdef ICONV_OPTION
2074                      | (filesfrom_convert ? RL_CONVERT : 0)
2075 #endif
2076                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2077         int implied_dot_dir = 0;
2078
2079         rprintf(FLOG, "building file list\n");
2080         if (show_filelist_p())
2081                 start_filelist_progress("building file list");
2082         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2083                 rprintf(FCLIENT, "sending incremental file list\n");
2084
2085         start_write = stats.total_written;
2086         gettimeofday(&start_tv, NULL);
2087
2088         if (relative_paths && protocol_version >= 30)
2089                 implied_dirs = 1; /* We send flagged implied dirs */
2090
2091 #ifdef SUPPORT_HARD_LINKS
2092         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2093                 init_hard_links();
2094 #endif
2095
2096         flist = cur_flist = flist_new(0, "send_file_list");
2097         if (inc_recurse) {
2098                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2099                 flags |= FLAG_DIVERT_DIRS;
2100         } else
2101                 dir_flist = cur_flist;
2102
2103         disable_buffering = io_start_buffering_out(f);
2104         if (filesfrom_fd >= 0) {
2105                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2106                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2107                                 full_fname(argv[0]));
2108                         exit_cleanup(RERR_FILESELECT);
2109                 }
2110                 if (protocol_version < 31) {
2111                         /* Older protocols send the files-from data w/o packaging
2112                          * it in multiplexed I/O packets, so temporarily switch
2113                          * to buffered I/O to match this behavior. */
2114                         reenable_multiplex = io_end_multiplex_in(MPLX_TO_BUFFERED);
2115                 }
2116                 use_ff_fd = 1;
2117         }
2118
2119         if (!orig_dir)
2120                 orig_dir = strdup(curr_dir);
2121
2122         while (1) {
2123                 char fbuf[MAXPATHLEN], *fn, name_type;
2124
2125                 if (use_ff_fd) {
2126                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2127                                 break;
2128                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2129                 } else {
2130                         if (argc-- == 0)
2131                                 break;
2132                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2133                         if (sanitize_paths)
2134                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2135                 }
2136
2137                 len = strlen(fbuf);
2138                 if (relative_paths) {
2139                         /* We clean up fbuf below. */
2140                         name_type = NORMAL_NAME;
2141                 } else if (!len || fbuf[len - 1] == '/') {
2142                         if (len == 2 && fbuf[0] == '.') {
2143                                 /* Turn "./" into just "." rather than "./." */
2144                                 fbuf[--len] = '\0';
2145                         } else {
2146                                 if (len + 1 >= MAXPATHLEN)
2147                                         overflow_exit("send_file_list");
2148                                 fbuf[len++] = '.';
2149                                 fbuf[len] = '\0';
2150                         }
2151                         name_type = DOTDIR_NAME;
2152                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2153                     && (len == 2 || fbuf[len-3] == '/')) {
2154                         if (len + 2 >= MAXPATHLEN)
2155                                 overflow_exit("send_file_list");
2156                         fbuf[len++] = '/';
2157                         fbuf[len++] = '.';
2158                         fbuf[len] = '\0';
2159                         name_type = DOTDIR_NAME;
2160                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2161                         name_type = DOTDIR_NAME;
2162                 else
2163                         name_type = NORMAL_NAME;
2164
2165                 dir = NULL;
2166
2167                 if (!relative_paths) {
2168                         p = strrchr(fbuf, '/');
2169                         if (p) {
2170                                 *p = '\0';
2171                                 if (p == fbuf)
2172                                         dir = "/";
2173                                 else
2174                                         dir = fbuf;
2175                                 len -= p - fbuf + 1;
2176                                 fn = p + 1;
2177                         } else
2178                                 fn = fbuf;
2179                 } else {
2180                         if ((p = strstr(fbuf, "/./")) != NULL) {
2181                                 *p = '\0';
2182                                 if (p == fbuf)
2183                                         dir = "/";
2184                                 else {
2185                                         dir = fbuf;
2186                                         clean_fname(dir, 0);
2187                                 }
2188                                 fn = p + 3;
2189                                 while (*fn == '/')
2190                                         fn++;
2191                                 if (!*fn)
2192                                         *--fn = '\0'; /* ensure room for '.' */
2193                         } else
2194                                 fn = fbuf;
2195                         /* A leading ./ can be used in relative mode to affect
2196                          * the dest dir without its name being in the path. */
2197                         if (*fn == '.' && fn[1] == '/' && fn[2] && !implied_dot_dir)
2198                                 implied_dot_dir = -1;
2199                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2200                                             | CFN_DROP_TRAILING_DOT_DIR);
2201                         if (len == 1) {
2202                                 if (fn[0] == '/') {
2203                                         fn = "/.";
2204                                         len = 2;
2205                                         name_type = DOTDIR_NAME;
2206                                 } else if (fn[0] == '.')
2207                                         name_type = DOTDIR_NAME;
2208                         } else if (fn[len-1] == '/') {
2209                                 fn[--len] = '\0';
2210                                 if (len == 1 && *fn == '.')
2211                                         name_type = DOTDIR_NAME;
2212                                 else
2213                                         name_type = SLASH_ENDING_NAME;
2214                         }
2215                         /* Reject a ".." dir in the active part of the path. */
2216                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2217                                 if ((p[2] == '/' || p[2] == '\0')
2218                                  && (p == fn || p[-1] == '/')) {
2219                                         rprintf(FERROR,
2220                                             "found \"..\" dir in relative path: %s\n",
2221                                             fn);
2222                                         exit_cleanup(RERR_SYNTAX);
2223                                 }
2224                         }
2225                 }
2226
2227                 if (!*fn) {
2228                         len = 1;
2229                         fn = ".";
2230                         name_type = DOTDIR_NAME;
2231                 }
2232
2233                 dirlen = dir ? strlen(dir) : 0;
2234                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2235                         if (!change_pathname(NULL, dir, -dirlen))
2236                                 goto bad_path;
2237                         lastdir = pathname;
2238                         lastdir_len = pathname_len;
2239                 } else if (!change_pathname(NULL, lastdir, lastdir_len)) {
2240                     bad_path:
2241                         if (implied_dot_dir < 0)
2242                                 implied_dot_dir = 0;
2243                         continue;
2244                 }
2245
2246                 if (implied_dot_dir < 0) {
2247                         implied_dot_dir = 1;
2248                         send_file_name(f, flist, ".", NULL, (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR, ALL_FILTERS);
2249                 }
2250
2251                 if (fn != fbuf)
2252                         memmove(fbuf, fn, len + 1);
2253
2254                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2255                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2256                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2257                         if (errno != ENOENT || missing_args == 0) {
2258                                 /* This is a transfer error, but inhibit deletion
2259                                  * only if we might be omitting an existing file. */
2260                                 if (errno != ENOENT)
2261                                         io_error |= IOERR_GENERAL;
2262                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2263                                         full_fname(fbuf));
2264                                 continue;
2265                         } else if (missing_args == 1) {
2266                                 /* Just ignore the arg. */
2267                                 continue;
2268                         } else /* (missing_args == 2) */ {
2269                                 /* Send the arg as a "missing" entry with
2270                                  * mode 0, which tells the generator to delete it. */
2271                                 memset(&st, 0, sizeof st);
2272                         }
2273                 }
2274
2275                 /* A dot-dir should not be excluded! */
2276                 if (name_type != DOTDIR_NAME && st.st_mode != 0
2277                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2278                         continue;
2279
2280                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2281                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2282                         continue;
2283                 }
2284
2285                 if (inc_recurse && relative_paths && *fbuf) {
2286                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2287                                 if (p - fbuf == 1 && *fbuf == '.') {
2288                                         if ((fn = strchr(p+1, '/')) != NULL)
2289                                                 p = fn;
2290                                 } else
2291                                         fn = p;
2292                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags,
2293                                                   st.st_mode == 0 ? MISSING_NAME : name_type);
2294                                 if (fn == p)
2295                                         continue;
2296                         }
2297                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2298                         /* Send the implied directories at the start of the
2299                          * source spec, so we get their permissions right. */
2300                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2301                 }
2302
2303                 if (one_file_system)
2304                         filesystem_dev = st.st_dev;
2305
2306                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2307                         struct file_struct *file;
2308                         file = send_file_name(f, flist, fbuf, &st,
2309                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2310                                               NO_FILTERS);
2311                         if (!file)
2312                                 continue;
2313                         if (inc_recurse) {
2314                                 if (name_type == DOTDIR_NAME) {
2315                                         if (send_dir_depth < 0) {
2316                                                 send_dir_depth = 0;
2317                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2318                                         }
2319                                         send_directory(f, flist, fbuf, len, flags);
2320                                 }
2321                         } else
2322                                 send_if_directory(f, flist, file, fbuf, len, flags);
2323                 } else
2324                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2325         }
2326
2327         if (reenable_multiplex >= 0)
2328                 io_start_multiplex_in(reenable_multiplex);
2329
2330         gettimeofday(&end_tv, NULL);
2331         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2332                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2333         if (stats.flist_buildtime == 0)
2334                 stats.flist_buildtime = 1;
2335         start_tv = end_tv;
2336
2337         /* Indicate end of file list */
2338         if (io_error == 0 || ignore_errors)
2339                 write_byte(f, 0);
2340         else if (use_safe_inc_flist) {
2341                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2342                 write_varint(f, io_error);
2343         } else {
2344                 if (delete_during && inc_recurse)
2345                         fatal_unsafe_io_error();
2346                 write_byte(f, 0);
2347         }
2348
2349 #ifdef SUPPORT_HARD_LINKS
2350         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2351                 idev_destroy();
2352 #endif
2353
2354         if (show_filelist_p())
2355                 finish_filelist_progress(flist);
2356
2357         gettimeofday(&end_tv, NULL);
2358         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2359                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2360
2361         /* When converting names, both sides keep an unsorted file-list array
2362          * because the names will differ on the sending and receiving sides
2363          * (both sides will use the unsorted index number for each item). */
2364
2365         /* Sort the list without removing any duplicates.  This allows the
2366          * receiving side to ask for whatever name it kept.  For incremental
2367          * recursion mode, the sender marks duplicate dirs so that it can
2368          * send them together in a single file-list. */
2369         if (need_unsorted_flist) {
2370                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2371                         out_of_memory("send_file_list");
2372                 memcpy(flist->sorted, flist->files,
2373                        flist->used * sizeof (struct file_struct*));
2374         } else
2375                 flist->sorted = flist->files;
2376         flist_sort_and_clean(flist, 0);
2377         file_total += flist->used;
2378         file_old_total += flist->used;
2379
2380         if (numeric_ids <= 0 && !inc_recurse)
2381                 send_id_list(f);
2382
2383         /* send the io_error flag */
2384         if (protocol_version < 30)
2385                 write_int(f, ignore_errors ? 0 : io_error);
2386         else if (!use_safe_inc_flist && io_error && !ignore_errors)
2387                 send_msg_int(MSG_IO_ERROR, io_error);
2388
2389         if (disable_buffering)
2390                 io_end_buffering_out(IOBUF_FREE_BUFS);
2391
2392         stats.flist_size = stats.total_written - start_write;
2393         stats.num_files = flist->used;
2394
2395         if (DEBUG_GTE(FLIST, 3))
2396                 output_flist(flist);
2397
2398         if (DEBUG_GTE(FLIST, 2))
2399                 rprintf(FINFO, "send_file_list done\n");
2400
2401         if (inc_recurse) {
2402                 send_dir_depth = 1;
2403                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2404                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2405                         flist->parent_ndx = -1;
2406                 flist_done_allocating(flist);
2407                 if (send_dir_ndx < 0) {
2408                         write_ndx(f, NDX_FLIST_EOF);
2409                         flist_eof = 1;
2410                         if (DEBUG_GTE(FLIST, 3))
2411                                 rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2412                 }
2413                 else if (file_total == 1) {
2414                         /* If we're creating incremental file-lists and there
2415                          * was just 1 item in the first file-list, send 1 more
2416                          * file-list to check if this is a 1-file xfer. */
2417                         send_extra_file_list(f, 1);
2418                 }
2419         } else {
2420                 flist_eof = 1;
2421                 if (DEBUG_GTE(FLIST, 3))
2422                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2423         }
2424
2425         return flist;
2426 }
2427
2428 struct file_list *recv_file_list(int f)
2429 {
2430         struct file_list *flist;
2431         int dstart, flags;
2432         int64 start_read;
2433
2434         if (!first_flist) {
2435                 if (show_filelist_p())
2436                         start_filelist_progress("receiving file list");
2437                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2438                         rprintf(FCLIENT, "receiving incremental file list\n");
2439                 rprintf(FLOG, "receiving file list\n");
2440                 if (usermap)
2441                         parse_name_map(usermap, True);
2442                 if (groupmap)
2443                         parse_name_map(groupmap, False);
2444         }
2445
2446         start_read = stats.total_read;
2447
2448 #ifdef SUPPORT_HARD_LINKS
2449         if (preserve_hard_links && !first_flist)
2450                 init_hard_links();
2451 #endif
2452
2453         flist = flist_new(0, "recv_file_list");
2454
2455         if (inc_recurse) {
2456                 if (flist->ndx_start == 1)
2457                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2458                 dstart = dir_flist->used;
2459         } else {
2460                 dir_flist = flist;
2461                 dstart = 0;
2462         }
2463
2464         while ((flags = read_byte(f)) != 0) {
2465                 struct file_struct *file;
2466
2467                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2468                         flags |= read_byte(f) << 8;
2469
2470                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2471                         int err;
2472                         if (!use_safe_inc_flist) {
2473                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2474                                 exit_cleanup(RERR_PROTOCOL);
2475                         }
2476                         err = read_varint(f);
2477                         if (!ignore_errors)
2478                                 io_error |= err;
2479                         break;
2480                 }
2481
2482                 flist_expand(flist, 1);
2483                 file = recv_file_entry(f, flist, flags);
2484
2485                 if (S_ISREG(file->mode)) {
2486                         /* Already counted */
2487                 } else if (S_ISDIR(file->mode)) {
2488                         if (inc_recurse) {
2489                                 flist_expand(dir_flist, 1);
2490                                 dir_flist->files[dir_flist->used++] = file;
2491                         }
2492                         stats.num_dirs++;
2493                 } else if (S_ISLNK(file->mode))
2494                         stats.num_symlinks++;
2495                 else if (IS_DEVICE(file->mode))
2496                         stats.num_symlinks++;
2497                 else
2498                         stats.num_specials++;
2499
2500                 flist->files[flist->used++] = file;
2501
2502                 maybe_emit_filelist_progress(flist->used);
2503
2504                 if (DEBUG_GTE(FLIST, 2)) {
2505                         char *name = f_name(file, NULL);
2506                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2507                 }
2508         }
2509         file_total += flist->used;
2510
2511         if (DEBUG_GTE(FLIST, 2))
2512                 rprintf(FINFO, "received %d names\n", flist->used);
2513
2514         if (show_filelist_p())
2515                 finish_filelist_progress(flist);
2516
2517         if (need_unsorted_flist) {
2518                 /* Create an extra array of index pointers that we can sort for
2519                  * the generator's use (for wading through the files in sorted
2520                  * order and for calling flist_find()).  We keep the "files"
2521                  * list unsorted for our exchange of index numbers with the
2522                  * other side (since their names may not sort the same). */
2523                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2524                         out_of_memory("recv_file_list");
2525                 memcpy(flist->sorted, flist->files,
2526                        flist->used * sizeof (struct file_struct*));
2527                 if (inc_recurse && dir_flist->used > dstart) {
2528                         static int dir_flist_malloced = 0;
2529                         if (dir_flist_malloced < dir_flist->malloced) {
2530                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2531                                                         struct file_struct *,
2532                                                         dir_flist->malloced);
2533                                 dir_flist_malloced = dir_flist->malloced;
2534                         }
2535                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2536                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2537                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2538                 }
2539         } else {
2540                 flist->sorted = flist->files;
2541                 if (inc_recurse && dir_flist->used > dstart) {
2542                         dir_flist->sorted = dir_flist->files;
2543                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2544                 }
2545         }
2546
2547         if (inc_recurse)
2548                 flist_done_allocating(flist);
2549         else if (f >= 0) {
2550                 recv_id_list(f, flist);
2551                 flist_eof = 1;
2552                 if (DEBUG_GTE(FLIST, 3))
2553                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2554         }
2555
2556         flist_sort_and_clean(flist, relative_paths);
2557
2558         if (protocol_version < 30) {
2559                 /* Recv the io_error flag */
2560                 int err = read_int(f);
2561                 if (!ignore_errors)
2562                         io_error |= err;
2563         } else if (inc_recurse && flist->ndx_start == 1) {
2564                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2565                         flist->parent_ndx = -1;
2566         }
2567
2568         if (DEBUG_GTE(FLIST, 3))
2569                 output_flist(flist);
2570
2571         if (DEBUG_GTE(FLIST, 2))
2572                 rprintf(FINFO, "recv_file_list done\n");
2573
2574         stats.flist_size += stats.total_read - start_read;
2575         stats.num_files += flist->used;
2576
2577         return flist;
2578 }
2579
2580 /* This is only used once by the receiver if the very first file-list
2581  * has exactly one item in it. */
2582 void recv_additional_file_list(int f)
2583 {
2584         struct file_list *flist;
2585         int ndx = read_ndx(f);
2586         if (ndx == NDX_FLIST_EOF) {
2587                 flist_eof = 1;
2588                 if (DEBUG_GTE(FLIST, 3))
2589                         rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
2590                 change_local_filter_dir(NULL, 0, 0);
2591         } else {
2592                 ndx = NDX_FLIST_OFFSET - ndx;
2593                 if (ndx < 0 || ndx >= dir_flist->used) {
2594                         ndx = NDX_FLIST_OFFSET - ndx;
2595                         rprintf(FERROR,
2596                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2597                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2598                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2599                         exit_cleanup(RERR_PROTOCOL);
2600                 }
2601                 if (DEBUG_GTE(FLIST, 3)) {
2602                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2603                                 who_am_i(), ndx);
2604                 }
2605                 flist = recv_file_list(f);
2606                 flist->parent_ndx = ndx;
2607         }
2608 }
2609
2610 /* Search for an identically-named item in the file list.  Note that the
2611  * items must agree in their directory-ness, or no match is returned. */
2612 int flist_find(struct file_list *flist, struct file_struct *f)
2613 {
2614         int low = flist->low, high = flist->high;
2615         int diff, mid, mid_up;
2616
2617         while (low <= high) {
2618                 mid = (low + high) / 2;
2619                 if (F_IS_ACTIVE(flist->sorted[mid]))
2620                         mid_up = mid;
2621                 else {
2622                         /* Scan for the next non-empty entry using the cached
2623                          * distance values.  If the value isn't fully up-to-
2624                          * date, update it. */
2625                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2626                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2627                                 do {
2628                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2629                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2630                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2631                         }
2632                         if (mid_up > high) {
2633                                 /* If there's nothing left above us, set high to
2634                                  * a non-empty entry below us and continue. */
2635                                 high = mid - (int)flist->sorted[mid]->len32;
2636                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2637                                         do {
2638                                             high -= (int)flist->sorted[high]->len32;
2639                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2640                                         flist->sorted[mid]->len32 = mid - high;
2641                                 }
2642                                 continue;
2643                         }
2644                 }
2645                 diff = f_name_cmp(flist->sorted[mid_up], f);
2646                 if (diff == 0) {
2647                         if (protocol_version < 29
2648                             && S_ISDIR(flist->sorted[mid_up]->mode)
2649                             != S_ISDIR(f->mode))
2650                                 return -1;
2651                         return mid_up;
2652                 }
2653                 if (diff < 0)
2654                         low = mid_up + 1;
2655                 else
2656                         high = mid - 1;
2657         }
2658         return -1;
2659 }
2660
2661 /* Search for an identically-named item in the file list.  Differs from
2662  * flist_find in that an item that agrees with "f" in directory-ness is
2663  * preferred but one that does not is still found. */
2664 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2665 {
2666         mode_t save_mode;
2667         int ndx;
2668
2669         /* First look for an item that agrees in directory-ness. */
2670         ndx = flist_find(flist, f);
2671         if (ndx >= 0)
2672                 return ndx;
2673
2674         /* Temporarily flip f->mode to look for an item of opposite
2675          * directory-ness. */
2676         save_mode = f->mode;
2677         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2678         ndx = flist_find(flist, f);
2679         f->mode = save_mode;
2680         return ndx;
2681 }
2682
2683 /*
2684  * Free up any resources a file_struct has allocated
2685  * and clear the file.
2686  */
2687 void clear_file(struct file_struct *file)
2688 {
2689         /* The +1 zeros out the first char of the basename. */
2690         memset(file, 0, FILE_STRUCT_LEN + 1);
2691         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2692          * entry.  Likewise for len32 in the opposite direction.  We assume
2693          * that we're alone for now since flist_find() will adjust the counts
2694          * it runs into that aren't up-to-date. */
2695         file->len32 = F_DEPTH(file) = 1;
2696 }
2697
2698 /* Allocate a new file list. */
2699 struct file_list *flist_new(int flags, char *msg)
2700 {
2701         struct file_list *flist;
2702
2703         if (!(flist = new0(struct file_list)))
2704                 out_of_memory(msg);
2705
2706         if (flags & FLIST_TEMP) {
2707                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2708                                                      out_of_memory,
2709                                                      POOL_INTERN)))
2710                         out_of_memory(msg);
2711         } else {
2712                 /* This is a doubly linked list with prev looping back to
2713                  * the end of the list, but the last next pointer is NULL. */
2714                 if (!first_flist) {
2715                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2716                                                        out_of_memory,
2717                                                        POOL_INTERN);
2718                         if (!flist->file_pool)
2719                                 out_of_memory(msg);
2720
2721                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2722
2723                         first_flist = cur_flist = flist->prev = flist;
2724                 } else {
2725                         struct file_list *prev = first_flist->prev;
2726
2727                         flist->file_pool = first_flist->file_pool;
2728
2729                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2730                         flist->flist_num = prev->flist_num + 1;
2731
2732                         flist->prev = prev;
2733                         prev->next = first_flist->prev = flist;
2734                 }
2735                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2736                 flist_cnt++;
2737         }
2738
2739         return flist;
2740 }
2741
2742 /* Free up all elements in a flist. */
2743 void flist_free(struct file_list *flist)
2744 {
2745         if (!flist->prev) {
2746                 /* Was FLIST_TEMP dir-list. */
2747         } else if (flist == flist->prev) {
2748                 first_flist = cur_flist = NULL;
2749                 file_total = 0;
2750                 flist_cnt = 0;
2751         } else {
2752                 if (flist == cur_flist)
2753                         cur_flist = flist->next;
2754                 if (flist == first_flist)
2755                         first_flist = first_flist->next;
2756                 else {
2757                         flist->prev->next = flist->next;
2758                         if (!flist->next)
2759                                 flist->next = first_flist;
2760                 }
2761                 flist->next->prev = flist->prev;
2762                 file_total -= flist->used;
2763                 flist_cnt--;
2764         }
2765
2766         if (!flist->prev || !flist_cnt)
2767                 pool_destroy(flist->file_pool);
2768         else
2769                 pool_free_old(flist->file_pool, flist->pool_boundary);
2770
2771         if (flist->sorted && flist->sorted != flist->files)
2772                 free(flist->sorted);
2773         free(flist->files);
2774         free(flist);
2775 }
2776
2777 /* This routine ensures we don't have any duplicate names in our file list.
2778  * duplicate names can cause corruption because of the pipelining. */
2779 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2780 {
2781         char fbuf[MAXPATHLEN];
2782         int i, prev_i;
2783
2784         if (!flist)
2785                 return;
2786         if (flist->used == 0) {
2787                 flist->high = -1;
2788                 flist->low = 0;
2789                 return;
2790         }
2791
2792         fsort(flist->sorted, flist->used);
2793
2794         if (!am_sender || inc_recurse) {
2795                 for (i = prev_i = 0; i < flist->used; i++) {
2796                         if (F_IS_ACTIVE(flist->sorted[i])) {
2797                                 prev_i = i;
2798                                 break;
2799                         }
2800                 }
2801                 flist->low = prev_i;
2802         } else {
2803                 i = prev_i = flist->used - 1;
2804                 flist->low = 0;
2805         }
2806
2807         while (++i < flist->used) {
2808                 int j;
2809                 struct file_struct *file = flist->sorted[i];
2810
2811                 if (!F_IS_ACTIVE(file))
2812                         continue;
2813                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2814                         j = prev_i;
2815                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2816                         int save_mode = file->mode;
2817                         /* Make sure that this directory doesn't duplicate a
2818                          * non-directory earlier in the list. */
2819                         flist->high = prev_i;
2820                         file->mode = S_IFREG;
2821                         j = flist_find(flist, file);
2822                         file->mode = save_mode;
2823                 } else
2824                         j = -1;
2825                 if (j >= 0) {
2826                         int keep, drop;
2827                         /* If one is a dir and the other is not, we want to
2828                          * keep the dir because it might have contents in the
2829                          * list.  Otherwise keep the first one. */
2830                         if (S_ISDIR(file->mode)) {
2831                                 struct file_struct *fp = flist->sorted[j];
2832                                 if (!S_ISDIR(fp->mode))
2833                                         keep = i, drop = j;
2834                                 else {
2835                                         if (am_sender)
2836                                                 file->flags |= FLAG_DUPLICATE;
2837                                         else { /* Make sure we merge our vital flags. */
2838                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2839                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2840                                         }
2841                                         keep = j, drop = i;
2842                                 }
2843                         } else
2844                                 keep = j, drop = i;
2845
2846                         if (!am_sender) {
2847                                 if (DEBUG_GTE(DUP, 1)) {
2848                                         rprintf(FINFO,
2849                                             "removing duplicate name %s from file list (%d)\n",
2850                                             f_name(file, fbuf), drop + flist->ndx_start);
2851                                 }
2852                                 clear_file(flist->sorted[drop]);
2853                         }
2854
2855                         if (keep == i) {
2856                                 if (flist->low == drop) {
2857                                         for (j = drop + 1;
2858                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2859                                              j++) {}
2860                                         flist->low = j;
2861                                 }
2862                                 prev_i = i;
2863                         }
2864                 } else
2865                         prev_i = i;
2866         }
2867         flist->high = prev_i;
2868
2869         if (strip_root) {
2870                 /* We need to strip off the leading slashes for relative
2871                  * paths, but this must be done _after_ the sorting phase. */
2872                 for (i = flist->low; i <= flist->high; i++) {
2873                         struct file_struct *file = flist->sorted[i];
2874
2875                         if (!file->dirname)
2876                                 continue;
2877                         while (*file->dirname == '/')
2878                                 file->dirname++;
2879                         if (!*file->dirname)
2880                                 file->dirname = NULL;
2881                 }
2882         }
2883
2884         if (prune_empty_dirs && !am_sender) {
2885                 int j, prev_depth = 0;
2886
2887                 prev_i = 0; /* It's OK that this isn't really true. */
2888
2889                 for (i = flist->low; i <= flist->high; i++) {
2890                         struct file_struct *fp, *file = flist->sorted[i];
2891
2892                         /* This temporarily abuses the F_DEPTH() value for a
2893                          * directory that is in a chain that might get pruned.
2894                          * We restore the old value if it gets a reprieve. */
2895                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2896                                 /* Dump empty dirs when coming back down. */
2897                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2898                                         fp = flist->sorted[prev_i];
2899                                         if (F_DEPTH(fp) >= 0)
2900                                                 break;
2901                                         prev_i = -F_DEPTH(fp)-1;
2902                                         clear_file(fp);
2903                                 }
2904                                 prev_depth = F_DEPTH(file);
2905                                 if (is_excluded(f_name(file, fbuf), 1,
2906                                                        ALL_FILTERS)) {
2907                                         /* Keep dirs through this dir. */
2908                                         for (j = prev_depth-1; ; j--) {
2909                                                 fp = flist->sorted[prev_i];
2910                                                 if (F_DEPTH(fp) >= 0)
2911                                                         break;
2912                                                 prev_i = -F_DEPTH(fp)-1;
2913                                                 F_DEPTH(fp) = j;
2914                                         }
2915                                 } else
2916                                         F_DEPTH(file) = -prev_i-1;
2917                                 prev_i = i;
2918                         } else {
2919                                 /* Keep dirs through this non-dir. */
2920                                 for (j = prev_depth; ; j--) {
2921                                         fp = flist->sorted[prev_i];
2922                                         if (F_DEPTH(fp) >= 0)
2923                                                 break;
2924                                         prev_i = -F_DEPTH(fp)-1;
2925                                         F_DEPTH(fp) = j;
2926                                 }
2927                         }
2928                 }
2929                 /* Dump all remaining empty dirs. */
2930                 while (1) {
2931                         struct file_struct *fp = flist->sorted[prev_i];
2932                         if (F_DEPTH(fp) >= 0)
2933                                 break;
2934                         prev_i = -F_DEPTH(fp)-1;
2935                         clear_file(fp);
2936                 }
2937
2938                 for (i = flist->low; i <= flist->high; i++) {
2939                         if (F_IS_ACTIVE(flist->sorted[i]))
2940                                 break;
2941                 }
2942                 flist->low = i;
2943                 for (i = flist->high; i >= flist->low; i--) {
2944                         if (F_IS_ACTIVE(flist->sorted[i]))
2945                                 break;
2946                 }
2947                 flist->high = i;
2948         }
2949 }
2950
2951 static void output_flist(struct file_list *flist)
2952 {
2953         char uidbuf[16], gidbuf[16], depthbuf[16];
2954         struct file_struct *file;
2955         const char *root, *dir, *slash, *name, *trail;
2956         const char *who = who_am_i();
2957         int i;
2958
2959         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2960                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2961         for (i = 0; i < flist->used; i++) {
2962                 file = flist->files[i];
2963                 if ((am_root || am_sender) && uid_ndx) {
2964                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2965                                  F_OWNER(file));
2966                 } else
2967                         *uidbuf = '\0';
2968                 if (gid_ndx) {
2969                         static char parens[] = "(\0)\0\0\0";
2970                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2971                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2972                                  pp, F_GROUP(file), pp + 2);
2973                 } else
2974                         *gidbuf = '\0';
2975                 if (!am_sender)
2976                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2977                 if (F_IS_ACTIVE(file)) {
2978                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2979                         if ((dir = file->dirname) == NULL)
2980                                 dir = slash = "";
2981                         else
2982                                 slash = "/";
2983                         name = file->basename;
2984                         trail = S_ISDIR(file->mode) ? "/" : "";
2985                 } else
2986                         root = dir = slash = name = trail = "";
2987                 rprintf(FINFO,
2988                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2989                         who, i + flist->ndx_start,
2990                         root, dir, slash, name, trail,
2991                         (int)file->mode, comma_num(F_LENGTH(file)),
2992                         uidbuf, gidbuf, file->flags);
2993         }
2994 }
2995
2996 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2997 enum fnc_type { t_PATH, t_ITEM };
2998
2999 static int found_prefix;
3000
3001 /* Compare the names of two file_struct entities, similar to how strcmp()
3002  * would do if it were operating on the joined strings.
3003  *
3004  * Some differences beginning with protocol_version 29: (1) directory names
3005  * are compared with an assumed trailing slash so that they compare in a
3006  * way that would cause them to sort immediately prior to any content they
3007  * may have; (2) a directory of any name compares after a non-directory of
3008  * any name at the same depth; (3) a directory with name "." compares prior
3009  * to anything else.  These changes mean that a directory and a non-dir
3010  * with the same name will not compare as equal (protocol_version >= 29).
3011  *
3012  * The dirname component can be an empty string, but the basename component
3013  * cannot (and never is in the current codebase).  The basename component
3014  * may be NULL (for a removed item), in which case it is considered to be
3015  * after any existing item. */
3016 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
3017 {
3018         int dif;
3019         const uchar *c1, *c2;
3020         enum fnc_state state1, state2;
3021         enum fnc_type type1, type2;
3022         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
3023
3024         if (!f1 || !F_IS_ACTIVE(f1)) {
3025                 if (!f2 || !F_IS_ACTIVE(f2))
3026                         return 0;
3027                 return -1;
3028         }
3029         if (!f2 || !F_IS_ACTIVE(f2))
3030                 return 1;
3031
3032         c1 = (uchar*)f1->dirname;
3033         c2 = (uchar*)f2->dirname;
3034         if (c1 == c2)
3035                 c1 = c2 = NULL;
3036         if (!c1) {
3037                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3038                 c1 = (const uchar*)f1->basename;
3039                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3040                         type1 = t_ITEM;
3041                         state1 = s_TRAILING;
3042                         c1 = (uchar*)"";
3043                 } else
3044                         state1 = s_BASE;
3045         } else {
3046                 type1 = t_path;
3047                 state1 = s_DIR;
3048         }
3049         if (!c2) {
3050                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3051                 c2 = (const uchar*)f2->basename;
3052                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3053                         type2 = t_ITEM;
3054                         state2 = s_TRAILING;
3055                         c2 = (uchar*)"";
3056                 } else
3057                         state2 = s_BASE;
3058         } else {
3059                 type2 = t_path;
3060                 state2 = s_DIR;
3061         }
3062
3063         if (type1 != type2)
3064                 return type1 == t_PATH ? 1 : -1;
3065
3066         do {
3067                 if (!*c1) {
3068                         switch (state1) {
3069                         case s_DIR:
3070                                 state1 = s_SLASH;
3071                                 c1 = (uchar*)"/";
3072                                 break;
3073                         case s_SLASH:
3074                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
3075                                 c1 = (const uchar*)f1->basename;
3076                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
3077                                         type1 = t_ITEM;
3078                                         state1 = s_TRAILING;
3079                                         c1 = (uchar*)"";
3080                                 } else
3081                                         state1 = s_BASE;
3082                                 break;
3083                         case s_BASE:
3084                                 state1 = s_TRAILING;
3085                                 if (type1 == t_PATH) {
3086                                         c1 = (uchar*)"/";
3087                                         break;
3088                                 }
3089                                 /* FALL THROUGH */
3090                         case s_TRAILING:
3091                                 type1 = t_ITEM;
3092                                 break;
3093                         }
3094                         if (*c2 && type1 != type2)
3095                                 return type1 == t_PATH ? 1 : -1;
3096                 }
3097                 if (!*c2) {
3098                         switch (state2) {
3099                         case s_DIR:
3100                                 state2 = s_SLASH;
3101                                 c2 = (uchar*)"/";
3102                                 break;
3103                         case s_SLASH:
3104                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
3105                                 c2 = (const uchar*)f2->basename;
3106                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
3107                                         type2 = t_ITEM;
3108                                         state2 = s_TRAILING;
3109                                         c2 = (uchar*)"";
3110                                 } else
3111                                         state2 = s_BASE;
3112                                 break;
3113                         case s_BASE:
3114                                 state2 = s_TRAILING;
3115                                 if (type2 == t_PATH) {
3116                                         c2 = (uchar*)"/";
3117                                         break;
3118                                 }
3119                                 /* FALL THROUGH */
3120                         case s_TRAILING:
3121                                 found_prefix = 1;
3122                                 if (!*c1)
3123                                         return 0;
3124                                 type2 = t_ITEM;
3125                                 break;
3126                         }
3127                         if (type1 != type2)
3128                                 return type1 == t_PATH ? 1 : -1;
3129                 }
3130         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3131
3132         return dif;
3133 }
3134
3135 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3136  * not match if f2's basename is not an exact match of a path element in f1.
3137  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3138 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3139 {
3140         found_prefix = 0;
3141         f_name_cmp(f1, f2);
3142         return found_prefix;
3143 }
3144
3145 char *f_name_buf(void)
3146 {
3147         static char names[5][MAXPATHLEN];
3148         static unsigned int n;
3149
3150         n = (n + 1) % (sizeof names / sizeof names[0]);
3151
3152         return names[n];
3153 }
3154
3155 /* Return a copy of the full filename of a flist entry, using the indicated
3156  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3157  * done because we checked the size when creating the file_struct entry.
3158  */
3159 char *f_name(const struct file_struct *f, char *fbuf)
3160 {
3161         if (!f || !F_IS_ACTIVE(f))
3162                 return NULL;
3163
3164         if (!fbuf)
3165                 fbuf = f_name_buf();
3166
3167         if (f->dirname) {
3168                 int len = strlen(f->dirname);
3169                 memcpy(fbuf, f->dirname, len);
3170                 fbuf[len] = '/';
3171                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3172         } else
3173                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3174
3175         return fbuf;
3176 }
3177
3178 /* Do a non-recursive scan of the named directory, possibly ignoring all
3179  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3180  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3181  * buffer (the functions we call will append names onto the end, but the old
3182  * dir value will be restored on exit). */
3183 struct file_list *get_dirlist(char *dirname, int dlen, int flags)
3184 {
3185         struct file_list *dirlist;
3186         char dirbuf[MAXPATHLEN];
3187         int save_recurse = recurse;
3188         int save_xfer_dirs = xfer_dirs;
3189         int save_prune_empty_dirs = prune_empty_dirs;
3190         int senddir_fd = flags & GDL_IGNORE_FILTER_RULES ? -2 : -1;
3191
3192         if (dlen < 0) {
3193                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3194                 if (dlen >= MAXPATHLEN)
3195                         return NULL;
3196                 dirname = dirbuf;
3197         }
3198
3199         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3200
3201         recurse = 0;
3202         xfer_dirs = 1;
3203         send_directory(senddir_fd, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3204         xfer_dirs = save_xfer_dirs;
3205         recurse = save_recurse;
3206         if (INFO_GTE(PROGRESS, 1))
3207                 flist_count_offset += dirlist->used;
3208
3209         prune_empty_dirs = 0;
3210         dirlist->sorted = dirlist->files;
3211         flist_sort_and_clean(dirlist, 0);
3212         prune_empty_dirs = save_prune_empty_dirs;
3213
3214         if (DEBUG_GTE(FLIST, 3))
3215                 output_flist(dirlist);
3216
3217         return dirlist;
3218 }