e0cad79888c4e69f147a10acf904d13fd862a2f1
[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) 2002-2008 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 "io.h"
27
28 extern int am_root;
29 extern int am_server;
30 extern int am_daemon;
31 extern int am_sender;
32 extern int am_generator;
33 extern int inc_recurse;
34 extern int always_checksum;
35 extern int module_id;
36 extern int ignore_errors;
37 extern int numeric_ids;
38 extern int recurse;
39 extern int use_qsort;
40 extern int xfer_dirs;
41 extern int filesfrom_fd;
42 extern int one_file_system;
43 extern int copy_dirlinks;
44 extern int keep_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 uid_ndx;
54 extern int gid_ndx;
55 extern int eol_nulls;
56 extern int relative_paths;
57 extern int implied_dirs;
58 extern int file_extra_cnt;
59 extern int ignore_perishable;
60 extern int non_perishable_cnt;
61 extern int prune_empty_dirs;
62 extern int copy_links;
63 extern int copy_unsafe_links;
64 extern int protocol_version;
65 extern int sanitize_paths;
66 extern int munge_symlinks;
67 extern int need_unsorted_flist;
68 extern int output_needs_newline;
69 extern int unsort_ndx;
70 extern struct stats stats;
71 extern char *filesfrom_host;
72
73 extern char curr_dir[MAXPATHLEN];
74
75 extern struct chmod_mode_struct *chmod_modes;
76
77 extern struct filter_list_struct filter_list;
78 extern struct filter_list_struct daemon_filter_list;
79
80 #ifdef ICONV_OPTION
81 extern int filesfrom_convert;
82 extern iconv_t ic_send, ic_recv;
83 #endif
84
85 #define PTR_SIZE (sizeof (struct file_struct *))
86
87 int io_error;
88 int checksum_len;
89 dev_t filesystem_dev; /* used to implement -x */
90
91 struct file_list *cur_flist, *first_flist, *dir_flist;
92 int send_dir_ndx = -1, send_dir_depth = -1;
93 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
94 int file_total = 0; /* total of all active items over all file-lists */
95 int flist_eof = 0; /* all the file-lists are now known */
96
97 #define NORMAL_NAME 0
98 #define SLASH_ENDING_NAME 1
99 #define DOTDIR_NAME 2
100
101 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
102  * internally, even if this platform does not allow files to have 64-bit inums.
103  * The only exception is if we're on a platform with no 64-bit type at all.
104  *
105  * Because we use read_longint() to get these off the wire, if you transfer
106  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
107  * machine with no 64-bit types then you will get an overflow error.
108  *
109  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
110  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
111  * be truncated.  But it's a kind of silly thing to do anyhow. */
112
113 /* The tmp_* vars are used as a cache area by make_file() to store data
114  * that the sender doesn't need to remember in its file list.  The data
115  * will survive just long enough to be used by send_file_entry(). */
116 static dev_t tmp_rdev;
117 #ifdef SUPPORT_HARD_LINKS
118 static int64 tmp_dev, tmp_ino;
119 #endif
120 static char tmp_sum[MAX_DIGEST_LEN];
121
122 static char empty_sum[MAX_DIGEST_LEN];
123 static int flist_count_offset; /* for --delete --progress */
124 static int dir_count = 0;
125
126 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
127 static void output_flist(struct file_list *flist);
128
129 void init_flist(void)
130 {
131         if (DEBUG_GTE(FLIST, 4)) {
132                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
133                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
134         }
135         checksum_len = protocol_version < 21 ? 2
136                      : protocol_version < 30 ? MD4_DIGEST_LEN
137                      : MD5_DIGEST_LEN;
138 }
139
140 static int show_filelist_p(void)
141 {
142         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
143 }
144
145 static void start_filelist_progress(char *kind)
146 {
147         rprintf(FCLIENT, "%s ... ", kind);
148         output_needs_newline = 1;
149         rflush(FINFO);
150 }
151
152 static void emit_filelist_progress(int count)
153 {
154         rprintf(FCLIENT, " %d files...\r", count);
155 }
156
157 static void maybe_emit_filelist_progress(int count)
158 {
159         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
160                 emit_filelist_progress(count);
161 }
162
163 static void finish_filelist_progress(const struct file_list *flist)
164 {
165         if (INFO_GTE(FLIST, 2)) {
166                 /* This overwrites the progress line */
167                 rprintf(FINFO, "%d file%sto consider\n",
168                         flist->used, flist->used == 1 ? " " : "s ");
169         } else {
170                 output_needs_newline = 0;
171                 rprintf(FINFO, "done\n");
172         }
173 }
174
175 void show_flist_stats(void)
176 {
177         /* Nothing yet */
178 }
179
180 /* Stat either a symlink or its referent, depending on the settings of
181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
182  *
183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
184  * MAXPATHLEN chars) will be set to the symlink's target string.
185  *
186  * The stat structure pointed to by stp will contain information about the
187  * link or the referent as appropriate, if they exist. */
188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
189 {
190 #ifdef SUPPORT_LINKS
191         if (link_stat(path, stp, copy_dirlinks) < 0)
192                 return -1;
193         if (S_ISLNK(stp->st_mode)) {
194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
195                 if (llen < 0)
196                         return -1;
197                 linkbuf[llen] = '\0';
198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
199                         if (INFO_GTE(SYMSAFE, 1)) {
200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
201                                         path, linkbuf);
202                         }
203                         return x_stat(path, stp, NULL);
204                 }
205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
208                                 llen - SYMLINK_PREFIX_LEN + 1);
209                 }
210         }
211         return 0;
212 #else
213         return x_stat(path, stp, NULL);
214 #endif
215 }
216
217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
218 {
219 #ifdef SUPPORT_LINKS
220         if (copy_links)
221                 return x_stat(path, stp, NULL);
222         if (x_lstat(path, stp, NULL) < 0)
223                 return -1;
224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
225                 STRUCT_STAT st;
226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
227                         *stp = st;
228         }
229         return 0;
230 #else
231         return x_stat(path, stp, NULL);
232 #endif
233 }
234
235 static inline int is_daemon_excluded(const char *fname, int is_dir)
236 {
237         if (daemon_filter_list.head
238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
239                 errno = ENOENT;
240                 return 1;
241         }
242         return 0;
243 }
244
245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
246 {
247         if (daemon_filter_list.head) {
248                 char *slash = path;
249
250                 while ((slash = strchr(slash+1, '/')) != NULL) {
251                         int ret;
252                         *slash = '\0';
253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
254                         *slash = '/';
255                         if (ret < 0) {
256                                 errno = ENOENT;
257                                 return 1;
258                         }
259                 }
260
261                 if (!ignore_filename
262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
263                         errno = ENOENT;
264                         return 1;
265                 }
266         }
267
268         return 0;
269 }
270
271 /* This function is used to check if a file should be included/excluded
272  * from the list of files based on its name and type etc.  The value of
273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
274 static int is_excluded(const char *fname, int is_dir, int filter_level)
275 {
276 #if 0 /* This currently never happens, so avoid a useless compare. */
277         if (filter_level == NO_FILTERS)
278                 return 0;
279 #endif
280         if (is_daemon_excluded(fname, is_dir))
281                 return 1;
282         if (filter_level != ALL_FILTERS)
283                 return 0;
284         if (filter_list.head
285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
286                 return 1;
287         return 0;
288 }
289
290 static void send_directory(int f, struct file_list *flist,
291                            char *fbuf, int len, int flags);
292
293 static const char *pathname, *orig_dir;
294 static int pathname_len;
295
296 /* Make sure flist can hold at least flist->used + extra entries. */
297 static void flist_expand(struct file_list *flist, int extra)
298 {
299         struct file_struct **new_ptr;
300
301         if (flist->used + extra <= flist->malloced)
302                 return;
303
304         if (flist->malloced < FLIST_START)
305                 flist->malloced = FLIST_START;
306         else if (flist->malloced >= FLIST_LINEAR)
307                 flist->malloced += FLIST_LINEAR;
308         else
309                 flist->malloced *= 2;
310
311         /* In case count jumped or we are starting the list
312          * with a known size just set it. */
313         if (flist->malloced < flist->used + extra)
314                 flist->malloced = flist->used + extra;
315
316         new_ptr = realloc_array(flist->files, struct file_struct *,
317                                 flist->malloced);
318
319         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
321                     who_am_i(),
322                     (double)sizeof flist->files[0] * flist->malloced,
323                     (new_ptr == flist->files) ? " not" : "");
324         }
325
326         flist->files = new_ptr;
327
328         if (!flist->files)
329                 out_of_memory("flist_expand");
330 }
331
332 static void flist_done_allocating(struct file_list *flist)
333 {
334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
335         if (flist->pool_boundary == ptr)
336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
337         else
338                 flist->pool_boundary = ptr;
339 }
340
341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
343  * with dir == NULL taken to be the starting directory, and dirlen < 0
344  * indicating that strdup(dir) should be called and then the -dirlen length
345  * value checked to ensure that it is not daemon-excluded. */
346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
347 {
348         if (dirlen < 0) {
349                 char *cpy = strdup(dir);
350                 if (*cpy != '/')
351                         change_dir(orig_dir, CD_SKIP_CHDIR);
352                 if (path_is_daemon_excluded(cpy, 0))
353                         goto chdir_error;
354                 dir = cpy;
355                 dirlen = -dirlen;
356         } else {
357                 if (file) {
358                         if (pathname == F_PATHNAME(file))
359                                 return 1;
360                         dir = F_PATHNAME(file);
361                         if (dir)
362                                 dirlen = strlen(dir);
363                 } else if (pathname == dir)
364                         return 1;
365                 if (dir && *dir != '/')
366                         change_dir(orig_dir, CD_SKIP_CHDIR);
367         }
368
369         pathname = dir;
370         pathname_len = dirlen;
371
372         if (!dir)
373                 dir = orig_dir;
374
375         if (!change_dir(dir, CD_NORMAL)) {
376           chdir_error:
377                 io_error |= IOERR_GENERAL;
378                 rsyserr(FERROR, errno, "change_dir %s failed", full_fname(dir));
379                 if (dir != orig_dir)
380                         change_dir(orig_dir, CD_NORMAL);
381                 pathname = NULL;
382                 pathname_len = 0;
383                 return 0;
384         }
385
386         return 1;
387 }
388
389 static void send_file_entry(int f, const char *fname, struct file_struct *file, int ndx, int first_ndx)
390 {
391         static time_t modtime;
392         static mode_t mode;
393 #ifdef SUPPORT_HARD_LINKS
394         static int64 dev;
395 #endif
396         static dev_t rdev;
397         static uint32 rdev_major;
398         static uid_t uid;
399         static gid_t gid;
400         static const char *user_name, *group_name;
401         static char lastname[MAXPATHLEN];
402         int first_hlink_ndx = -1;
403         int l1, l2;
404         int xflags;
405
406         /* Initialize starting value of xflags. */
407         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
408                 dir_count++;
409                 if (file->flags & FLAG_CONTENT_DIR)
410                         xflags = file->flags & FLAG_TOP_DIR;
411                 else if (file->flags & FLAG_IMPLIED_DIR)
412                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
413                 else
414                         xflags = XMIT_NO_CONTENT_DIR;
415         } else
416                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
417
418         if (file->mode == mode)
419                 xflags |= XMIT_SAME_MODE;
420         else
421                 mode = file->mode;
422
423         if ((preserve_devices && IS_DEVICE(mode))
424          || (preserve_specials && IS_SPECIAL(mode))) {
425                 if (protocol_version < 28) {
426                         if (tmp_rdev == rdev)
427                                 xflags |= XMIT_SAME_RDEV_pre28;
428                         else
429                                 rdev = tmp_rdev;
430                 } else {
431                         rdev = tmp_rdev;
432                         if ((uint32)major(rdev) == rdev_major)
433                                 xflags |= XMIT_SAME_RDEV_MAJOR;
434                         else
435                                 rdev_major = major(rdev);
436                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
437                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
438                 }
439         } else if (protocol_version < 28)
440                 rdev = MAKEDEV(0, 0);
441         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
442                 xflags |= XMIT_SAME_UID;
443         else {
444                 uid = F_OWNER(file);
445                 if (!numeric_ids) {
446                         user_name = add_uid(uid);
447                         if (inc_recurse && user_name)
448                                 xflags |= XMIT_USER_NAME_FOLLOWS;
449                 }
450         }
451         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
452                 xflags |= XMIT_SAME_GID;
453         else {
454                 gid = F_GROUP(file);
455                 if (!numeric_ids) {
456                         group_name = add_gid(gid);
457                         if (inc_recurse && group_name)
458                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
459                 }
460         }
461         if (file->modtime == modtime)
462                 xflags |= XMIT_SAME_TIME;
463         else
464                 modtime = file->modtime;
465
466 #ifdef SUPPORT_HARD_LINKS
467         if (tmp_dev != 0) {
468                 if (protocol_version >= 30) {
469                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
470                         first_hlink_ndx = (int32)(long)np->data - 1;
471                         if (first_hlink_ndx < 0) {
472                                 np->data = (void*)(long)(first_ndx + ndx + 1);
473                                 xflags |= XMIT_HLINK_FIRST;
474                         }
475                 } else {
476                         if (tmp_dev == dev) {
477                                 if (protocol_version >= 28)
478                                         xflags |= XMIT_SAME_DEV_pre30;
479                         } else
480                                 dev = tmp_dev;
481                 }
482                 xflags |= XMIT_HLINKED;
483         }
484 #endif
485
486         for (l1 = 0;
487             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
488             l1++) {}
489         l2 = strlen(fname+l1);
490
491         if (l1 > 0)
492                 xflags |= XMIT_SAME_NAME;
493         if (l2 > 255)
494                 xflags |= XMIT_LONG_NAME;
495
496         /* We must make sure we don't send a zero flag byte or the
497          * other end will terminate the flist transfer.  Note that
498          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
499          * it's harmless way to add a bit to the first flag byte. */
500         if (protocol_version >= 28) {
501                 if (!xflags && !S_ISDIR(mode))
502                         xflags |= XMIT_TOP_DIR;
503                 if ((xflags & 0xFF00) || !xflags) {
504                         xflags |= XMIT_EXTENDED_FLAGS;
505                         write_shortint(f, xflags);
506                 } else
507                         write_byte(f, xflags);
508         } else {
509                 if (!(xflags & 0xFF))
510                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
511                 write_byte(f, xflags);
512         }
513         if (xflags & XMIT_SAME_NAME)
514                 write_byte(f, l1);
515         if (xflags & XMIT_LONG_NAME)
516                 write_varint30(f, l2);
517         else
518                 write_byte(f, l2);
519         write_buf(f, fname + l1, l2);
520
521         if (first_hlink_ndx >= 0) {
522                 write_varint(f, first_hlink_ndx);
523                 if (first_hlink_ndx >= first_ndx)
524                         goto the_end;
525         }
526
527         write_varlong30(f, F_LENGTH(file), 3);
528         if (!(xflags & XMIT_SAME_TIME)) {
529                 if (protocol_version >= 30)
530                         write_varlong(f, modtime, 4);
531                 else
532                         write_int(f, modtime);
533         }
534         if (!(xflags & XMIT_SAME_MODE))
535                 write_int(f, to_wire_mode(mode));
536         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
537                 if (protocol_version < 30)
538                         write_int(f, uid);
539                 else {
540                         write_varint(f, uid);
541                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
542                                 int len = strlen(user_name);
543                                 write_byte(f, len);
544                                 write_buf(f, user_name, len);
545                         }
546                 }
547         }
548         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
549                 if (protocol_version < 30)
550                         write_int(f, gid);
551                 else {
552                         write_varint(f, gid);
553                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
554                                 int len = strlen(group_name);
555                                 write_byte(f, len);
556                                 write_buf(f, group_name, len);
557                         }
558                 }
559         }
560         if ((preserve_devices && IS_DEVICE(mode))
561          || (preserve_specials && IS_SPECIAL(mode))) {
562                 if (protocol_version < 28) {
563                         if (!(xflags & XMIT_SAME_RDEV_pre28))
564                                 write_int(f, (int)rdev);
565                 } else {
566                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
567                                 write_varint30(f, major(rdev));
568                         if (protocol_version >= 30)
569                                 write_varint(f, minor(rdev));
570                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
571                                 write_byte(f, minor(rdev));
572                         else
573                                 write_int(f, minor(rdev));
574                 }
575         }
576
577 #ifdef SUPPORT_LINKS
578         if (preserve_links && S_ISLNK(mode)) {
579                 const char *sl = F_SYMLINK(file);
580                 int len = strlen(sl);
581                 write_varint30(f, len);
582                 write_buf(f, sl, len);
583         }
584 #endif
585
586 #ifdef SUPPORT_HARD_LINKS
587         if (tmp_dev != 0 && protocol_version < 30) {
588                 if (protocol_version < 26) {
589                         /* 32-bit dev_t and ino_t */
590                         write_int(f, (int32)dev);
591                         write_int(f, (int32)tmp_ino);
592                 } else {
593                         /* 64-bit dev_t and ino_t */
594                         if (!(xflags & XMIT_SAME_DEV_pre30))
595                                 write_longint(f, dev);
596                         write_longint(f, tmp_ino);
597                 }
598         }
599 #endif
600
601         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
602                 const char *sum;
603                 if (S_ISREG(mode))
604                         sum = tmp_sum;
605                 else {
606                         /* Prior to 28, we sent a useless set of nulls. */
607                         sum = empty_sum;
608                 }
609                 write_buf(f, sum, checksum_len);
610         }
611
612   the_end:
613         strlcpy(lastname, fname, MAXPATHLEN);
614
615         if (S_ISREG(mode) || S_ISLNK(mode))
616                 stats.total_size += F_LENGTH(file);
617 }
618
619 static struct file_struct *recv_file_entry(struct file_list *flist,
620                                            int xflags, int f)
621 {
622         static int64 modtime;
623         static mode_t mode;
624 #ifdef SUPPORT_HARD_LINKS
625         static int64 dev;
626 #endif
627         static dev_t rdev;
628         static uint32 rdev_major;
629         static uid_t uid;
630         static gid_t gid;
631         static uint16 gid_flags;
632         static char lastname[MAXPATHLEN], *lastdir;
633         static int lastdir_depth, lastdir_len = -1;
634         static unsigned int del_hier_name_len = 0;
635         static int in_del_hier = 0;
636         char thisname[MAXPATHLEN];
637         unsigned int l1 = 0, l2 = 0;
638         int alloc_len, basename_len, linkname_len;
639         int extra_len = file_extra_cnt * EXTRA_LEN;
640         int first_hlink_ndx = -1;
641         int64 file_length;
642         const char *basename;
643         struct file_struct *file;
644         alloc_pool_t *pool;
645         char *bp;
646
647         if (xflags & XMIT_SAME_NAME)
648                 l1 = read_byte(f);
649
650         if (xflags & XMIT_LONG_NAME)
651                 l2 = read_varint30(f);
652         else
653                 l2 = read_byte(f);
654
655         if (l2 >= MAXPATHLEN - l1) {
656                 rprintf(FERROR,
657                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
658                         xflags, l1, l2, lastname, who_am_i());
659                 overflow_exit("recv_file_entry");
660         }
661
662         strlcpy(thisname, lastname, l1 + 1);
663         read_sbuf(f, &thisname[l1], l2);
664         thisname[l1 + l2] = 0;
665
666         /* Abuse basename_len for a moment... */
667         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
668
669 #ifdef ICONV_OPTION
670         if (ic_recv != (iconv_t)-1) {
671                 xbuf outbuf, inbuf;
672
673                 INIT_CONST_XBUF(outbuf, thisname);
674                 INIT_XBUF(inbuf, lastname, basename_len, -1);
675
676                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
677                         io_error |= IOERR_GENERAL;
678                         rprintf(FINFO,
679                             "[%s] cannot convert filename: %s (%s)\n",
680                             who_am_i(), lastname, strerror(errno));
681                         outbuf.len = 0;
682                 }
683                 outbuf.buf[outbuf.len] = '\0';
684         }
685 #endif
686
687         if (*thisname)
688                 clean_fname(thisname, 0);
689
690         if (sanitize_paths)
691                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
692
693         if ((basename = strrchr(thisname, '/')) != NULL) {
694                 int len = basename++ - thisname;
695                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
696                         lastdir = new_array(char, len + 1);
697                         memcpy(lastdir, thisname, len);
698                         lastdir[len] = '\0';
699                         lastdir_len = len;
700                         lastdir_depth = count_dir_elements(lastdir);
701                 }
702         } else
703                 basename = thisname;
704         basename_len = strlen(basename) + 1; /* count the '\0' */
705
706 #ifdef SUPPORT_HARD_LINKS
707         if (protocol_version >= 30
708          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
709                 first_hlink_ndx = read_varint(f);
710                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
711                         rprintf(FERROR,
712                                 "hard-link reference out of range: %d (%d)\n",
713                                 first_hlink_ndx, flist->ndx_start + flist->used);
714                         exit_cleanup(RERR_PROTOCOL);
715                 }
716                 if (first_hlink_ndx >= flist->ndx_start) {
717                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
718                         file_length = F_LENGTH(first);
719                         modtime = first->modtime;
720                         mode = first->mode;
721                         if (preserve_uid)
722                                 uid = F_OWNER(first);
723                         if (preserve_gid)
724                                 gid = F_GROUP(first);
725                         if ((preserve_devices && IS_DEVICE(mode))
726                          || (preserve_specials && IS_SPECIAL(mode))) {
727                                 uint32 *devp = F_RDEV_P(first);
728                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
729                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
730                         }
731                         if (preserve_links && S_ISLNK(mode))
732                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
733                         else
734                                 linkname_len = 0;
735                         goto create_object;
736                 }
737         }
738 #endif
739
740         file_length = read_varlong30(f, 3);
741         if (!(xflags & XMIT_SAME_TIME)) {
742                 if (protocol_version >= 30) {
743                         modtime = read_varlong(f, 4);
744 #if SIZEOF_TIME_T < SIZEOF_INT64
745                         if (!am_generator && (int64)(time_t)modtime != modtime) {
746                                 rprintf(FERROR_XFER,
747                                     "Time value of %s truncated on receiver.\n",
748                                     lastname);
749                         }
750 #endif
751                 } else
752                         modtime = read_int(f);
753         }
754         if (!(xflags & XMIT_SAME_MODE))
755                 mode = from_wire_mode(read_int(f));
756
757         if (chmod_modes && !S_ISLNK(mode))
758                 mode = tweak_mode(mode, chmod_modes);
759
760         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
761                 if (protocol_version < 30)
762                         uid = (uid_t)read_int(f);
763                 else {
764                         uid = (uid_t)read_varint(f);
765                         if (xflags & XMIT_USER_NAME_FOLLOWS)
766                                 uid = recv_user_name(f, uid);
767                         else if (inc_recurse && am_root && !numeric_ids)
768                                 uid = match_uid(uid);
769                 }
770         }
771         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
772                 if (protocol_version < 30)
773                         gid = (gid_t)read_int(f);
774                 else {
775                         gid = (gid_t)read_varint(f);
776                         gid_flags = 0;
777                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
778                                 gid = recv_group_name(f, gid, &gid_flags);
779                         else if (inc_recurse && (!am_root || !numeric_ids))
780                                 gid = match_gid(gid, &gid_flags);
781                 }
782         }
783
784         if ((preserve_devices && IS_DEVICE(mode))
785          || (preserve_specials && IS_SPECIAL(mode))) {
786                 if (protocol_version < 28) {
787                         if (!(xflags & XMIT_SAME_RDEV_pre28))
788                                 rdev = (dev_t)read_int(f);
789                 } else {
790                         uint32 rdev_minor;
791                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
792                                 rdev_major = read_varint30(f);
793                         if (protocol_version >= 30)
794                                 rdev_minor = read_varint(f);
795                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
796                                 rdev_minor = read_byte(f);
797                         else
798                                 rdev_minor = read_int(f);
799                         rdev = MAKEDEV(rdev_major, rdev_minor);
800                 }
801                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
802                 file_length = 0;
803         } else if (protocol_version < 28)
804                 rdev = MAKEDEV(0, 0);
805
806 #ifdef SUPPORT_LINKS
807         if (preserve_links && S_ISLNK(mode)) {
808                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
809                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
810                         rprintf(FERROR, "overflow: linkname_len=%d\n",
811                                 linkname_len - 1);
812                         overflow_exit("recv_file_entry");
813                 }
814                 if (munge_symlinks)
815                         linkname_len += SYMLINK_PREFIX_LEN;
816         }
817         else
818 #endif
819                 linkname_len = 0;
820
821 #ifdef SUPPORT_HARD_LINKS
822   create_object:
823         if (preserve_hard_links) {
824                 if (protocol_version < 28 && S_ISREG(mode))
825                         xflags |= XMIT_HLINKED;
826                 if (xflags & XMIT_HLINKED)
827                         extra_len += (inc_recurse+1) * EXTRA_LEN;
828         }
829 #endif
830
831 #ifdef SUPPORT_ACLS
832         /* Directories need an extra int32 for the default ACL. */
833         if (preserve_acls && S_ISDIR(mode))
834                 extra_len += EXTRA_LEN;
835 #endif
836
837         if (always_checksum && S_ISREG(mode))
838                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
839
840 #if SIZEOF_INT64 >= 8
841         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
842                 extra_len += EXTRA_LEN;
843 #endif
844         if (file_length < 0) {
845                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
846                 exit_cleanup(RERR_UNSUPPORTED);
847         }
848
849         if (inc_recurse && S_ISDIR(mode)) {
850                 if (one_file_system) {
851                         /* Room to save the dir's device for -x */
852                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
853                 }
854                 pool = dir_flist->file_pool;
855         } else
856                 pool = flist->file_pool;
857
858 #if EXTRA_ROUNDING > 0
859         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
860                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
861 #endif
862
863         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
864                   + linkname_len;
865         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
866
867         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
868         bp += extra_len;
869         file = (struct file_struct *)bp;
870         bp += FILE_STRUCT_LEN;
871
872         memcpy(bp, basename, basename_len);
873
874 #ifdef SUPPORT_HARD_LINKS
875         if (xflags & XMIT_HLINKED)
876                 file->flags |= FLAG_HLINKED;
877 #endif
878         file->modtime = (time_t)modtime;
879         file->len32 = (uint32)file_length;
880 #if SIZEOF_INT64 >= 8
881         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
882 #if SIZEOF_CAPITAL_OFF_T < 8
883                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
884                 exit_cleanup(RERR_UNSUPPORTED);
885 #else
886                 file->flags |= FLAG_LENGTH64;
887                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
888 #endif
889         }
890 #endif
891         file->mode = mode;
892         if (preserve_uid)
893                 F_OWNER(file) = uid;
894         if (preserve_gid) {
895                 F_GROUP(file) = gid;
896                 file->flags |= gid_flags;
897         }
898         if (unsort_ndx)
899                 F_NDX(file) = flist->used + flist->ndx_start;
900
901         if (basename != thisname) {
902                 file->dirname = lastdir;
903                 F_DEPTH(file) = lastdir_depth + 1;
904         } else
905                 F_DEPTH(file) = 1;
906
907         if (S_ISDIR(mode)) {
908                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
909                         F_DEPTH(file)--;
910                 if (protocol_version >= 30) {
911                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
912                                 if (xflags & XMIT_TOP_DIR)
913                                         file->flags |= FLAG_TOP_DIR;
914                                 file->flags |= FLAG_CONTENT_DIR;
915                         } else if (xflags & XMIT_TOP_DIR)
916                                 file->flags |= FLAG_IMPLIED_DIR;
917                 } else if (xflags & XMIT_TOP_DIR) {
918                         in_del_hier = recurse;
919                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
920                         if (relative_paths && del_hier_name_len > 2
921                             && lastname[del_hier_name_len-1] == '.'
922                             && lastname[del_hier_name_len-2] == '/')
923                                 del_hier_name_len -= 2;
924                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
925                 } else if (in_del_hier) {
926                         if (!relative_paths || !del_hier_name_len
927                          || (l1 >= del_hier_name_len
928                           && lastname[del_hier_name_len] == '/'))
929                                 file->flags |= FLAG_CONTENT_DIR;
930                         else
931                                 in_del_hier = 0;
932                 }
933         }
934
935         if ((preserve_devices && IS_DEVICE(mode))
936          || (preserve_specials && IS_SPECIAL(mode))) {
937                 uint32 *devp = F_RDEV_P(file);
938                 DEV_MAJOR(devp) = major(rdev);
939                 DEV_MINOR(devp) = minor(rdev);
940         }
941
942 #ifdef SUPPORT_LINKS
943         if (linkname_len) {
944                 bp += basename_len;
945                 if (first_hlink_ndx >= flist->ndx_start) {
946                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
947                         memcpy(bp, F_SYMLINK(first), linkname_len);
948                 } else if (munge_symlinks) {
949                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
950                         bp += SYMLINK_PREFIX_LEN;
951                         linkname_len -= SYMLINK_PREFIX_LEN;
952                         read_sbuf(f, bp, linkname_len - 1);
953                 } else {
954                         read_sbuf(f, bp, linkname_len - 1);
955                         if (sanitize_paths)
956                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
957                 }
958         }
959 #endif
960
961 #ifdef SUPPORT_HARD_LINKS
962         if (preserve_hard_links && xflags & XMIT_HLINKED) {
963                 if (protocol_version >= 30) {
964                         if (xflags & XMIT_HLINK_FIRST) {
965                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
966                         } else
967                                 F_HL_GNUM(file) = first_hlink_ndx;
968                 } else {
969                         static int32 cnt = 0;
970                         struct ht_int64_node *np;
971                         int64 ino;
972                         int32 ndx;
973                         if (protocol_version < 26) {
974                                 dev = read_int(f);
975                                 ino = read_int(f);
976                         } else {
977                                 if (!(xflags & XMIT_SAME_DEV_pre30))
978                                         dev = read_longint(f);
979                                 ino = read_longint(f);
980                         }
981                         np = idev_find(dev, ino);
982                         ndx = (int32)(long)np->data - 1;
983                         if (ndx < 0) {
984                                 ndx = cnt++;
985                                 np->data = (void*)(long)cnt;
986                         }
987                         F_HL_GNUM(file) = ndx;
988                 }
989         }
990 #endif
991
992         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
993                 if (S_ISREG(mode))
994                         bp = F_SUM(file);
995                 else {
996                         /* Prior to 28, we get a useless set of nulls. */
997                         bp = tmp_sum;
998                 }
999                 if (first_hlink_ndx >= flist->ndx_start) {
1000                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1001                         memcpy(bp, F_SUM(first), checksum_len);
1002                 } else
1003                         read_buf(f, bp, checksum_len);
1004         }
1005
1006 #ifdef SUPPORT_ACLS
1007         if (preserve_acls && !S_ISLNK(mode))
1008                 receive_acl(file, f);
1009 #endif
1010 #ifdef SUPPORT_XATTRS
1011         if (preserve_xattrs)
1012                 receive_xattr(file, f );
1013 #endif
1014
1015         if (S_ISREG(mode) || S_ISLNK(mode))
1016                 stats.total_size += file_length;
1017
1018         return file;
1019 }
1020
1021 /* Create a file_struct for a named file by reading its stat() information
1022  * and performing extensive checks against global options.
1023  *
1024  * Returns a pointer to the new file struct, or NULL if there was an error
1025  * or this file should be excluded.
1026  *
1027  * Note: Any error (here or in send_file_name) that results in the omission of
1028  * an existent source file from the file list should set
1029  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1030  * destination if --delete is on. */
1031 struct file_struct *make_file(const char *fname, struct file_list *flist,
1032                               STRUCT_STAT *stp, int flags, int filter_level)
1033 {
1034         static char *lastdir;
1035         static int lastdir_len = -1;
1036         struct file_struct *file;
1037         char thisname[MAXPATHLEN];
1038         char linkname[MAXPATHLEN];
1039         int alloc_len, basename_len, linkname_len;
1040         int extra_len = file_extra_cnt * EXTRA_LEN;
1041         const char *basename;
1042         alloc_pool_t *pool;
1043         STRUCT_STAT st;
1044         char *bp;
1045
1046         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1047                 io_error |= IOERR_GENERAL;
1048                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1049                 return NULL;
1050         }
1051         clean_fname(thisname, 0);
1052         if (sanitize_paths)
1053                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1054
1055         if (stp && S_ISDIR(stp->st_mode)) {
1056                 st = *stp; /* Needed for "symlink/." with --relative. */
1057                 *linkname = '\0'; /* make IBM code checker happy */
1058         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1059                 int save_errno = errno;
1060                 /* See if file is excluded before reporting an error. */
1061                 if (filter_level != NO_FILTERS
1062                  && (is_excluded(thisname, 0, filter_level)
1063                   || is_excluded(thisname, 1, filter_level))) {
1064                         if (ignore_perishable && save_errno != ENOENT)
1065                                 non_perishable_cnt++;
1066                         return NULL;
1067                 }
1068                 if (save_errno == ENOENT) {
1069 #ifdef SUPPORT_LINKS
1070                         /* When our options tell us to follow a symlink that
1071                          * points nowhere, tell the user about the symlink
1072                          * instead of giving a "vanished" message.  We only
1073                          * dereference a symlink if one of the --copy*links
1074                          * options was specified, so there's no need for the
1075                          * extra lstat() if one of these options isn't on. */
1076                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1077                          && x_lstat(thisname, &st, NULL) == 0
1078                          && S_ISLNK(st.st_mode)) {
1079                                 io_error |= IOERR_GENERAL;
1080                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1081                                         full_fname(thisname));
1082                         } else
1083 #endif
1084                         {
1085                                 enum logcode c = am_daemon && protocol_version < 28
1086                                                ? FERROR : FWARNING;
1087                                 io_error |= IOERR_VANISHED;
1088                                 rprintf(c, "file has vanished: %s\n",
1089                                         full_fname(thisname));
1090                         }
1091                 } else {
1092                         io_error |= IOERR_GENERAL;
1093                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1094                                 full_fname(thisname));
1095                 }
1096                 return NULL;
1097         }
1098
1099         if (filter_level == NO_FILTERS)
1100                 goto skip_filters;
1101
1102         if (S_ISDIR(st.st_mode)) {
1103                 if (!xfer_dirs) {
1104                         rprintf(FINFO, "skipping directory %s\n", thisname);
1105                         return NULL;
1106                 }
1107                 /* -x only affects dirs because we need to avoid recursing
1108                  * into a mount-point directory, not to avoid copying a
1109                  * symlinked file if -L (or similar) was specified. */
1110                 if (one_file_system && st.st_dev != filesystem_dev
1111                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1112                         if (one_file_system > 1) {
1113                                 if (INFO_GTE(MOUNT, 1)) {
1114                                         rprintf(FINFO,
1115                                             "[%s] skipping mount-point dir %s\n",
1116                                             who_am_i(), thisname);
1117                                 }
1118                                 return NULL;
1119                         }
1120                         flags |= FLAG_MOUNT_DIR;
1121                         flags &= ~FLAG_CONTENT_DIR;
1122                 }
1123         } else
1124                 flags &= ~FLAG_CONTENT_DIR;
1125
1126         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1127                 if (ignore_perishable)
1128                         non_perishable_cnt++;
1129                 return NULL;
1130         }
1131
1132         if (lp_ignore_nonreadable(module_id)) {
1133 #ifdef SUPPORT_LINKS
1134                 if (!S_ISLNK(st.st_mode))
1135 #endif
1136                         if (access(thisname, R_OK) != 0)
1137                                 return NULL;
1138         }
1139
1140   skip_filters:
1141
1142         /* Only divert a directory in the main transfer. */
1143         if (flist) {
1144                 if (flist->prev && S_ISDIR(st.st_mode)
1145                  && flags & FLAG_DIVERT_DIRS) {
1146                         /* Room for parent/sibling/next-child info. */
1147                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1148                         if (relative_paths)
1149                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1150                         pool = dir_flist->file_pool;
1151                 } else
1152                         pool = flist->file_pool;
1153         } else {
1154 #ifdef SUPPORT_ACLS
1155                 /* Directories need an extra int32 for the default ACL. */
1156                 if (preserve_acls && S_ISDIR(st.st_mode))
1157                         extra_len += EXTRA_LEN;
1158 #endif
1159                 pool = NULL;
1160         }
1161
1162         if (DEBUG_GTE(FLIST, 2)) {
1163                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1164                         who_am_i(), thisname, filter_level);
1165         }
1166
1167         if ((basename = strrchr(thisname, '/')) != NULL) {
1168                 int len = basename++ - thisname;
1169                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1170                         lastdir = new_array(char, len + 1);
1171                         memcpy(lastdir, thisname, len);
1172                         lastdir[len] = '\0';
1173                         lastdir_len = len;
1174                 }
1175         } else
1176                 basename = thisname;
1177         basename_len = strlen(basename) + 1; /* count the '\0' */
1178
1179 #ifdef SUPPORT_LINKS
1180         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1181 #else
1182         linkname_len = 0;
1183 #endif
1184
1185 #if SIZEOF_CAPITAL_OFF_T >= 8
1186         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1187                 extra_len += EXTRA_LEN;
1188 #endif
1189
1190 #if EXTRA_ROUNDING > 0
1191         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1192                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1193 #endif
1194
1195         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1196                   + linkname_len;
1197         if (pool)
1198                 bp = pool_alloc(pool, alloc_len, "make_file");
1199         else {
1200                 if (!(bp = new_array(char, alloc_len)))
1201                         out_of_memory("make_file");
1202         }
1203
1204         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1205         bp += extra_len;
1206         file = (struct file_struct *)bp;
1207         bp += FILE_STRUCT_LEN;
1208
1209         memcpy(bp, basename, basename_len);
1210
1211 #ifdef SUPPORT_HARD_LINKS
1212         if (preserve_hard_links && flist && flist->prev) {
1213                 if (protocol_version >= 28
1214                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1215                  : S_ISREG(st.st_mode)) {
1216                         tmp_dev = st.st_dev;
1217                         tmp_ino = st.st_ino;
1218                 } else
1219                         tmp_dev = 0;
1220         }
1221 #endif
1222
1223 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1224         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1225                 tmp_rdev = st.st_rdev;
1226                 st.st_size = 0;
1227         }
1228 #endif
1229
1230         file->flags = flags;
1231         file->modtime = st.st_mtime;
1232         file->len32 = (uint32)st.st_size;
1233 #if SIZEOF_CAPITAL_OFF_T >= 8
1234         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1235                 file->flags |= FLAG_LENGTH64;
1236                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1237         }
1238 #endif
1239         file->mode = st.st_mode;
1240         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1241                 F_OWNER(file) = st.st_uid;
1242         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1243                 F_GROUP(file) = st.st_gid;
1244
1245         if (basename != thisname)
1246                 file->dirname = lastdir;
1247
1248 #ifdef SUPPORT_LINKS
1249         if (linkname_len)
1250                 memcpy(bp + basename_len, linkname, linkname_len);
1251 #endif
1252
1253         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1254                 file_checksum(thisname, tmp_sum, st.st_size);
1255
1256         if (am_sender)
1257                 F_PATHNAME(file) = pathname;
1258         else if (!pool)
1259                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1260
1261         /* This code is only used by the receiver when it is building
1262          * a list of files for a delete pass. */
1263         if (keep_dirlinks && linkname_len && flist) {
1264                 STRUCT_STAT st2;
1265                 int save_mode = file->mode;
1266                 file->mode = S_IFDIR; /* Find a directory with our name. */
1267                 if (flist_find(dir_flist, file) >= 0
1268                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1269                         file->modtime = st2.st_mtime;
1270                         file->len32 = 0;
1271                         file->mode = st2.st_mode;
1272                         if (uid_ndx)
1273                                 F_OWNER(file) = st2.st_uid;
1274                         if (gid_ndx)
1275                                 F_GROUP(file) = st2.st_gid;
1276                 } else
1277                         file->mode = save_mode;
1278         }
1279
1280         if (basename_len == 0+1) {
1281                 if (!pool)
1282                         unmake_file(file);
1283                 return NULL;
1284         }
1285
1286         if (unsort_ndx)
1287                 F_NDX(file) = dir_count;
1288
1289         return file;
1290 }
1291
1292 /* Only called for temporary file_struct entries created by make_file(). */
1293 void unmake_file(struct file_struct *file)
1294 {
1295         free(REQ_EXTRA(file, F_DEPTH(file)));
1296 }
1297
1298 static struct file_struct *send_file_name(int f, struct file_list *flist,
1299                                           const char *fname, STRUCT_STAT *stp,
1300                                           int flags, int filter_level)
1301 {
1302         struct file_struct *file;
1303
1304         file = make_file(fname, flist, stp, flags, filter_level);
1305         if (!file)
1306                 return NULL;
1307
1308         if (chmod_modes && !S_ISLNK(file->mode))
1309                 file->mode = tweak_mode(file->mode, chmod_modes);
1310
1311         if (f >= 0) {
1312                 char fbuf[MAXPATHLEN];
1313 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1314                 stat_x sx;
1315 #endif
1316
1317 #ifdef ICONV_OPTION
1318                 if (ic_send != (iconv_t)-1) {
1319                         xbuf outbuf, inbuf;
1320
1321                         INIT_CONST_XBUF(outbuf, fbuf);
1322
1323                         if (file->dirname) {
1324                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1325                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1326                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1327                                         goto convert_error;
1328                                 outbuf.size += 2;
1329                                 outbuf.buf[outbuf.len++] = '/';
1330                         }
1331
1332                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1333                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1334                           convert_error:
1335                                 io_error |= IOERR_GENERAL;
1336                                 rprintf(FINFO,
1337                                     "[%s] cannot convert filename: %s (%s)\n",
1338                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1339                                 return NULL;
1340                         }
1341                         outbuf.buf[outbuf.len] = '\0';
1342                 } else
1343 #endif
1344                         f_name(file, fbuf);
1345
1346 #ifdef SUPPORT_ACLS
1347                 if (preserve_acls && !S_ISLNK(file->mode)) {
1348                         sx.st.st_mode = file->mode;
1349                         sx.acc_acl = sx.def_acl = NULL;
1350                         if (get_acl(fname, &sx) < 0) {
1351                                 io_error |= IOERR_GENERAL;
1352                                 return NULL;
1353                         }
1354                 }
1355 #endif
1356 #ifdef SUPPORT_XATTRS
1357                 if (preserve_xattrs) {
1358                         sx.xattr = NULL;
1359                         if (get_xattr(fname, &sx) < 0) {
1360                                 io_error |= IOERR_GENERAL;
1361                                 return NULL;
1362                         }
1363                 }
1364 #endif
1365
1366                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1367
1368 #ifdef SUPPORT_ACLS
1369                 if (preserve_acls && !S_ISLNK(file->mode)) {
1370                         send_acl(&sx, f);
1371                         free_acl(&sx);
1372                 }
1373 #endif
1374 #ifdef SUPPORT_XATTRS
1375                 if (preserve_xattrs) {
1376                         F_XATTR(file) = send_xattr(&sx, f);
1377                         free_xattr(&sx);
1378                 }
1379 #endif
1380         }
1381
1382         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1383
1384         flist_expand(flist, 1);
1385         flist->files[flist->used++] = file;
1386
1387         return file;
1388 }
1389
1390 static void send_if_directory(int f, struct file_list *flist,
1391                               struct file_struct *file,
1392                               char *fbuf, unsigned int ol,
1393                               int flags)
1394 {
1395         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1396
1397         if (S_ISDIR(file->mode)
1398             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1399                 void *save_filters;
1400                 unsigned int len = strlen(fbuf);
1401                 if (len > 1 && fbuf[len-1] == '/')
1402                         fbuf[--len] = '\0';
1403                 if (len >= MAXPATHLEN - 1) {
1404                         io_error |= IOERR_GENERAL;
1405                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1406                                 full_fname(fbuf));
1407                         return;
1408                 }
1409                 save_filters = push_local_filters(fbuf, len);
1410                 send_directory(f, flist, fbuf, len, flags);
1411                 pop_local_filters(save_filters);
1412                 fbuf[ol] = '\0';
1413                 if (is_dot_dir)
1414                         fbuf[ol-1] = '.';
1415         }
1416 }
1417
1418 static int file_compare(const void *file1, const void *file2)
1419 {
1420         return f_name_cmp(*(struct file_struct **)file1,
1421                           *(struct file_struct **)file2);
1422 }
1423
1424 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1425  * version, but I (Wayne) changed the merge code to do less copying and
1426  * to require only half the amount of temporary memory. */
1427 static void fsort_tmp(struct file_struct **fp, size_t num,
1428                       struct file_struct **tmp)
1429 {
1430         struct file_struct **f1, **f2, **t;
1431         size_t n1, n2;
1432
1433         n1 = num / 2;
1434         n2 = num - n1;
1435         f1 = fp;
1436         f2 = fp + n1;
1437
1438         if (n1 > 1)
1439                 fsort_tmp(f1, n1, tmp);
1440         if (n2 > 1)
1441                 fsort_tmp(f2, n2, tmp);
1442
1443         while (f_name_cmp(*f1, *f2) <= 0) {
1444                 if (!--n1)
1445                         return;
1446                 f1++;
1447         }
1448
1449         t = tmp;
1450         memcpy(t, f1, n1 * PTR_SIZE);
1451
1452         *f1++ = *f2++, n2--;
1453
1454         while (n1 > 0 && n2 > 0) {
1455                 if (f_name_cmp(*t, *f2) <= 0)
1456                         *f1++ = *t++, n1--;
1457                 else
1458                         *f1++ = *f2++, n2--;
1459         }
1460
1461         if (n1 > 0)
1462                 memcpy(f1, t, n1 * PTR_SIZE);
1463 }
1464
1465 /* This file-struct sorting routine makes sure that any identical names in
1466  * the file list stay in the same order as they were in the original list.
1467  * This is particularly vital in inc_recurse mode where we expect a sort
1468  * on the flist to match the exact order of a sort on the dir_flist. */
1469 static void fsort(struct file_struct **fp, size_t num)
1470 {
1471         if (num <= 1)
1472                 return;
1473
1474         if (use_qsort)
1475                 qsort(fp, num, PTR_SIZE, file_compare);
1476         else {
1477                 struct file_struct **tmp = new_array(struct file_struct *,
1478                                                      (num+1) / 2);
1479                 fsort_tmp(fp, num, tmp);
1480                 free(tmp);
1481         }
1482 }
1483
1484 /* We take an entire set of sibling dirs from the sorted flist and link them
1485  * into the tree, setting the appropriate parent/child/sibling pointers. */
1486 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1487                              int dir_cnt)
1488 {
1489         int i;
1490         int32 *dp = NULL;
1491         int32 *parent_dp = parent_ndx < 0 ? NULL
1492                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1493
1494         flist_expand(dir_flist, dir_cnt);
1495         dir_flist->sorted = dir_flist->files;
1496
1497         for (i = 0; dir_cnt; i++) {
1498                 struct file_struct *file = from_flist->sorted[i];
1499
1500                 if (!S_ISDIR(file->mode))
1501                         continue;
1502
1503                 dir_flist->files[dir_flist->used++] = file;
1504                 dir_cnt--;
1505
1506                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1507                         continue;
1508
1509                 if (dp)
1510                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1511                 else if (parent_dp)
1512                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1513                 else
1514                         send_dir_ndx = dir_flist->used - 1;
1515
1516                 dp = F_DIR_NODE_P(file);
1517                 DIR_PARENT(dp) = parent_ndx;
1518                 DIR_FIRST_CHILD(dp) = -1;
1519         }
1520         if (dp)
1521                 DIR_NEXT_SIBLING(dp) = -1;
1522 }
1523
1524 /* This function is normally called by the sender, but the receiving side also
1525  * calls it from get_dirlist() with f set to -1 so that we just construct the
1526  * file list in memory without sending it over the wire.  Also, get_dirlist()
1527  * might call this with f set to -2, which also indicates that local filter
1528  * rules should be ignored. */
1529 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1530                            int flags)
1531 {
1532         struct dirent *di;
1533         unsigned remainder;
1534         char *p;
1535         DIR *d;
1536         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1537         int start = flist->used;
1538         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1539
1540         assert(flist != NULL);
1541
1542         if (!(d = opendir(fbuf))) {
1543                 io_error |= IOERR_GENERAL;
1544                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1545                 return;
1546         }
1547
1548         p = fbuf + len;
1549         if (len != 1 || *fbuf != '/')
1550                 *p++ = '/';
1551         *p = '\0';
1552         remainder = MAXPATHLEN - (p - fbuf);
1553
1554         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1555                 char *dname = d_name(di);
1556                 if (dname[0] == '.' && (dname[1] == '\0'
1557                     || (dname[1] == '.' && dname[2] == '\0')))
1558                         continue;
1559                 if (strlcpy(p, dname, remainder) >= remainder) {
1560                         io_error |= IOERR_GENERAL;
1561                         rprintf(FINFO,
1562                                 "cannot send long-named file %s\n",
1563                                 full_fname(fbuf));
1564                         continue;
1565                 }
1566                 if (dname[0] == '\0') {
1567                         io_error |= IOERR_GENERAL;
1568                         rprintf(FINFO,
1569                                 "cannot send file with empty name in %s\n",
1570                                 full_fname(fbuf));
1571                         continue;
1572                 }
1573
1574                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1575         }
1576
1577         fbuf[len] = '\0';
1578
1579         if (errno) {
1580                 io_error |= IOERR_GENERAL;
1581                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1582         }
1583
1584         closedir(d);
1585
1586         if (f >= 0 && recurse && !divert_dirs) {
1587                 int i, end = flist->used - 1;
1588                 /* send_if_directory() bumps flist->used, so use "end". */
1589                 for (i = start; i <= end; i++)
1590                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1591         }
1592 }
1593
1594 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1595                               char *start, char *limit, int flags, char name_type)
1596 {
1597         static char lastpath[MAXPATHLEN] = "";
1598         static int lastpath_len = 0;
1599         static struct file_struct *lastpath_struct = NULL;
1600         struct file_struct *file;
1601         item_list *relname_list;
1602         relnamecache **rnpp;
1603         int len, need_new_dir, depth = 0;
1604         struct filter_list_struct save_filter_list = filter_list;
1605
1606         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1607         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1608
1609         if (inc_recurse) {
1610                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1611                  && lastpath_len == limit - fname
1612                  && strncmp(lastpath, fname, lastpath_len) == 0)
1613                         need_new_dir = 0;
1614                 else
1615                         need_new_dir = 1;
1616         } else {
1617                 char *tp = fname, *lp = lastpath;
1618                 /* Skip any initial directories in our path that we
1619                  * have in common with lastpath. */
1620                 assert(start == fname);
1621                 for ( ; ; tp++, lp++) {
1622                         if (tp == limit) {
1623                                 if (*lp == '/' || *lp == '\0')
1624                                         goto done;
1625                                 break;
1626                         }
1627                         if (*lp != *tp)
1628                                 break;
1629                         if (*tp == '/') {
1630                                 start = tp;
1631                                 depth++;
1632                         }
1633                 }
1634                 need_new_dir = 1;
1635         }
1636
1637         if (need_new_dir) {
1638                 int save_copy_links = copy_links;
1639                 int save_xfer_dirs = xfer_dirs;
1640                 char *slash;
1641
1642                 copy_links = xfer_dirs = 1;
1643
1644                 *limit = '\0';
1645
1646                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1647                         *slash = '\0';
1648                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1649                         depth++;
1650                         if (!inc_recurse && file && S_ISDIR(file->mode))
1651                                 change_local_filter_dir(fname, strlen(fname), depth);
1652                         *slash = '/';
1653                 }
1654
1655                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1656                 if (inc_recurse) {
1657                         if (file && !S_ISDIR(file->mode))
1658                                 file = NULL;
1659                         lastpath_struct = file;
1660                 } else if (file && S_ISDIR(file->mode))
1661                         change_local_filter_dir(fname, strlen(fname), ++depth);
1662
1663                 strlcpy(lastpath, fname, sizeof lastpath);
1664                 lastpath_len = limit - fname;
1665
1666                 *limit = '/';
1667
1668                 copy_links = save_copy_links;
1669                 xfer_dirs = save_xfer_dirs;
1670
1671                 if (!inc_recurse)
1672                         goto done;
1673         }
1674
1675         if (!lastpath_struct)
1676                 goto done; /* dir must have vanished */
1677
1678         len = strlen(limit+1);
1679         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1680         if (!relname_list) {
1681                 if (!(relname_list = new0(item_list)))
1682                         out_of_memory("send_implied_dirs");
1683                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1684         }
1685         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1686         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1687                 out_of_memory("send_implied_dirs");
1688         (*rnpp)->name_type = name_type;
1689         strlcpy((*rnpp)->fname, limit+1, len + 1);
1690
1691 done:
1692         filter_list = save_filter_list;
1693 }
1694
1695 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1696 {
1697         char fbuf[MAXPATHLEN];
1698         item_list *relname_list;
1699         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1700         size_t j;
1701
1702         f_name(file, fbuf);
1703         dlen = strlen(fbuf);
1704
1705         if (!change_pathname(file, NULL, 0))
1706                 exit_cleanup(RERR_FILESELECT);
1707
1708         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1709
1710         if (file->flags & FLAG_CONTENT_DIR) {
1711                 if (one_file_system) {
1712                         STRUCT_STAT st;
1713                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1714                                 io_error |= IOERR_GENERAL;
1715                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1716                                         full_fname(fbuf));
1717                                 return;
1718                         }
1719                         filesystem_dev = st.st_dev;
1720                 }
1721                 send_directory(f, flist, fbuf, dlen, flags);
1722         }
1723
1724         if (!relative_paths)
1725                 return;
1726
1727         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1728         if (!relname_list)
1729                 return;
1730
1731         for (j = 0; j < relname_list->count; j++) {
1732                 char *slash;
1733                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1734                 char name_type = rnp->name_type;
1735
1736                 fbuf[dlen] = '/';
1737                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1738                 free(rnp);
1739                 if (len >= (int)sizeof fbuf)
1740                         continue; /* Impossible... */
1741
1742                 slash = strchr(fbuf+dlen+1, '/');
1743                 if (slash) {
1744                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1745                         continue;
1746                 }
1747
1748                 if (name_type != NORMAL_NAME) {
1749                         STRUCT_STAT st;
1750                         if (link_stat(fbuf, &st, 1) != 0) {
1751                                 io_error |= IOERR_GENERAL;
1752                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1753                                         full_fname(fbuf));
1754                                 continue;
1755                         }
1756                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1757                 } else
1758                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1759         }
1760
1761         free(relname_list);
1762 }
1763
1764 void send_extra_file_list(int f, int at_least)
1765 {
1766         struct file_list *flist;
1767         int64 start_write;
1768         uint16 prev_flags;
1769         int old_cnt, save_io_error = io_error;
1770
1771         if (flist_eof)
1772                 return;
1773
1774         /* Keep sending data until we have the requested number of
1775          * files in the upcoming file-lists. */
1776         old_cnt = cur_flist->used;
1777         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1778                 old_cnt += flist->used;
1779         while (file_total - old_cnt < at_least) {
1780                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1781                 int dir_ndx, dstart = dir_count;
1782                 const char *pathname = F_PATHNAME(file);
1783                 int32 *dp;
1784
1785                 flist = flist_new(0, "send_extra_file_list");
1786                 start_write = stats.total_written;
1787
1788                 if (unsort_ndx)
1789                         dir_ndx = F_NDX(file);
1790                 else
1791                         dir_ndx = send_dir_ndx;
1792                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1793                 flist->parent_ndx = dir_ndx;
1794
1795                 send1extra(f, file, flist);
1796                 prev_flags = file->flags;
1797                 dp = F_DIR_NODE_P(file);
1798
1799                 /* If there are any duplicate directory names that follow, we
1800                  * send all the dirs together in one file-list.  The dir_flist
1801                  * tree links all the child subdirs onto the last dup dir. */
1802                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1803                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1804                         send_dir_ndx = dir_ndx;
1805                         file = dir_flist->sorted[dir_ndx];
1806                         /* Try to avoid some duplicate scanning of identical dirs. */
1807                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1808                                 file->flags &= ~FLAG_CONTENT_DIR;
1809                         send1extra(f, file, flist);
1810                         prev_flags = file->flags;
1811                         dp = F_DIR_NODE_P(file);
1812                 }
1813
1814                 write_byte(f, 0);
1815
1816                 if (need_unsorted_flist) {
1817                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1818                                 out_of_memory("send_extra_file_list");
1819                         memcpy(flist->sorted, flist->files,
1820                                flist->used * sizeof (struct file_struct*));
1821                 } else
1822                         flist->sorted = flist->files;
1823
1824                 flist_sort_and_clean(flist, 0);
1825
1826                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1827                 flist_done_allocating(flist);
1828
1829                 file_total += flist->used;
1830                 stats.flist_size += stats.total_written - start_write;
1831                 stats.num_files += flist->used;
1832                 if (DEBUG_GTE(FLIST, 3))
1833                         output_flist(flist);
1834
1835                 if (DIR_FIRST_CHILD(dp) >= 0) {
1836                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1837                         send_dir_depth++;
1838                 } else {
1839                         while (DIR_NEXT_SIBLING(dp) < 0) {
1840                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1841                                         write_ndx(f, NDX_FLIST_EOF);
1842                                         flist_eof = 1;
1843                                         change_local_filter_dir(NULL, 0, 0);
1844                                         goto finish;
1845                                 }
1846                                 send_dir_depth--;
1847                                 file = dir_flist->sorted[send_dir_ndx];
1848                                 dp = F_DIR_NODE_P(file);
1849                         }
1850                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1851                 }
1852         }
1853
1854   finish:
1855         if (io_error != save_io_error && !ignore_errors)
1856                 send_msg_int(MSG_IO_ERROR, io_error);
1857 }
1858
1859 struct file_list *send_file_list(int f, int argc, char *argv[])
1860 {
1861         static const char *lastdir;
1862         static int lastdir_len = -1;
1863         int len, dirlen;
1864         STRUCT_STAT st;
1865         char *p, *dir;
1866         struct file_list *flist;
1867         struct timeval start_tv, end_tv;
1868         int64 start_write;
1869         int use_ff_fd = 0;
1870         int disable_buffering;
1871         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1872         int reading_remotely = filesfrom_host != NULL;
1873         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1874 #ifdef ICONV_OPTION
1875                      | (filesfrom_convert ? RL_CONVERT : 0)
1876 #endif
1877                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1878         int implied_dot_dir = 0;
1879
1880         rprintf(FLOG, "building file list\n");
1881         if (show_filelist_p())
1882                 start_filelist_progress("building file list");
1883         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
1884                 rprintf(FCLIENT, "sending incremental file list\n");
1885
1886         start_write = stats.total_written;
1887         gettimeofday(&start_tv, NULL);
1888
1889         if (!orig_dir)
1890                 orig_dir = strdup(curr_dir);
1891
1892         if (relative_paths && protocol_version >= 30)
1893                 implied_dirs = 1; /* We send flagged implied dirs */
1894
1895 #ifdef SUPPORT_HARD_LINKS
1896         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1897                 init_hard_links();
1898 #endif
1899
1900         flist = cur_flist = flist_new(0, "send_file_list");
1901         if (inc_recurse) {
1902                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1903                 flags |= FLAG_DIVERT_DIRS;
1904         } else
1905                 dir_flist = cur_flist;
1906
1907         disable_buffering = io_start_buffering_out(f);
1908         if (filesfrom_fd >= 0) {
1909                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1910                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1911                                 full_fname(argv[0]));
1912                         exit_cleanup(RERR_FILESELECT);
1913                 }
1914                 use_ff_fd = 1;
1915         }
1916
1917         while (1) {
1918                 char fbuf[MAXPATHLEN], *fn, name_type;
1919
1920                 if (use_ff_fd) {
1921                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1922                                 break;
1923                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1924                 } else {
1925                         if (argc-- == 0)
1926                                 break;
1927                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1928                         if (sanitize_paths)
1929                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1930                 }
1931
1932                 len = strlen(fbuf);
1933                 if (relative_paths) {
1934                         /* We clean up fbuf below. */
1935                         name_type = NORMAL_NAME;
1936                 } else if (!len || fbuf[len - 1] == '/') {
1937                         if (len == 2 && fbuf[0] == '.') {
1938                                 /* Turn "./" into just "." rather than "./." */
1939                                 fbuf[--len] = '\0';
1940                         } else {
1941                                 if (len + 1 >= MAXPATHLEN)
1942                                         overflow_exit("send_file_list");
1943                                 fbuf[len++] = '.';
1944                                 fbuf[len] = '\0';
1945                         }
1946                         name_type = DOTDIR_NAME;
1947                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1948                     && (len == 2 || fbuf[len-3] == '/')) {
1949                         if (len + 2 >= MAXPATHLEN)
1950                                 overflow_exit("send_file_list");
1951                         fbuf[len++] = '/';
1952                         fbuf[len++] = '.';
1953                         fbuf[len] = '\0';
1954                         name_type = DOTDIR_NAME;
1955                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1956                         name_type = DOTDIR_NAME;
1957                 else
1958                         name_type = NORMAL_NAME;
1959
1960                 dir = NULL;
1961
1962                 if (!relative_paths) {
1963                         p = strrchr(fbuf, '/');
1964                         if (p) {
1965                                 *p = '\0';
1966                                 if (p == fbuf)
1967                                         dir = "/";
1968                                 else
1969                                         dir = fbuf;
1970                                 len -= p - fbuf + 1;
1971                                 fn = p + 1;
1972                         } else
1973                                 fn = fbuf;
1974                 } else {
1975                         if ((p = strstr(fbuf, "/./")) != NULL) {
1976                                 *p = '\0';
1977                                 if (p == fbuf)
1978                                         dir = "/";
1979                                 else {
1980                                         dir = fbuf;
1981                                         clean_fname(dir, 0);
1982                                 }
1983                                 fn = p + 3;
1984                                 while (*fn == '/')
1985                                         fn++;
1986                                 if (!*fn)
1987                                         *--fn = '\0'; /* ensure room for '.' */
1988                         } else
1989                                 fn = fbuf;
1990                         /* A leading ./ can be used in relative mode to affect
1991                          * the dest dir without its name being in the path. */
1992                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
1993                                 send_file_name(f, flist, ".", NULL,
1994                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
1995                                     ALL_FILTERS);
1996                                 implied_dot_dir = 1;
1997                         }
1998                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
1999                                             | CFN_DROP_TRAILING_DOT_DIR);
2000                         if (len == 1) {
2001                                 if (fn[0] == '/') {
2002                                         fn = "/.";
2003                                         len = 2;
2004                                         name_type = DOTDIR_NAME;
2005                                 } else if (fn[0] == '.')
2006                                         name_type = DOTDIR_NAME;
2007                         } else if (fn[len-1] == '/') {
2008                                 fn[--len] = '\0';
2009                                 if (len == 1 && *fn == '.')
2010                                         name_type = DOTDIR_NAME;
2011                                 else
2012                                         name_type = SLASH_ENDING_NAME;
2013                         }
2014                         /* Reject a ".." dir in the active part of the path. */
2015                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2016                                 if ((p[2] == '/' || p[2] == '\0')
2017                                  && (p == fn || p[-1] == '/')) {
2018                                         rprintf(FERROR,
2019                                             "found \"..\" dir in relative path: %s\n",
2020                                             fn);
2021                                         exit_cleanup(RERR_SYNTAX);
2022                                 }
2023                         }
2024                 }
2025
2026                 if (!*fn) {
2027                         len = 1;
2028                         fn = ".";
2029                         name_type = DOTDIR_NAME;
2030                 }
2031
2032                 dirlen = dir ? strlen(dir) : 0;
2033                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2034                         if (!change_pathname(NULL, dir, -dirlen))
2035                                 continue;
2036                         lastdir = pathname;
2037                         lastdir_len = pathname_len;
2038                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2039                         continue;
2040
2041                 if (fn != fbuf)
2042                         memmove(fbuf, fn, len + 1);
2043
2044                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2045                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2046                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2047                         io_error |= IOERR_GENERAL;
2048                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2049                                 full_fname(fbuf));
2050                         continue;
2051                 }
2052
2053                 /* A dot-dir should not be excluded! */
2054                 if (name_type != DOTDIR_NAME
2055                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2056                         continue;
2057
2058                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2059                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2060                         continue;
2061                 }
2062
2063                 if (inc_recurse && relative_paths && *fbuf) {
2064                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2065                                 if (p - fbuf == 1 && *fbuf == '.') {
2066                                         if ((fn = strchr(p+1, '/')) != NULL)
2067                                                 p = fn;
2068                                 } else
2069                                         fn = p;
2070                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2071                                 if (fn == p)
2072                                         continue;
2073                         }
2074                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2075                         /* Send the implied directories at the start of the
2076                          * source spec, so we get their permissions right. */
2077                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2078                 }
2079
2080                 if (one_file_system)
2081                         filesystem_dev = st.st_dev;
2082
2083                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2084                         struct file_struct *file;
2085                         file = send_file_name(f, flist, fbuf, &st,
2086                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2087                                               NO_FILTERS);
2088                         if (!file)
2089                                 continue;
2090                         if (inc_recurse) {
2091                                 if (name_type == DOTDIR_NAME) {
2092                                         if (send_dir_depth < 0) {
2093                                                 send_dir_depth = 0;
2094                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2095                                         }
2096                                         send_directory(f, flist, fbuf, len, flags);
2097                                 }
2098                         } else
2099                                 send_if_directory(f, flist, file, fbuf, len, flags);
2100                 } else
2101                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2102         }
2103
2104         gettimeofday(&end_tv, NULL);
2105         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2106                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2107         if (stats.flist_buildtime == 0)
2108                 stats.flist_buildtime = 1;
2109         start_tv = end_tv;
2110
2111         write_byte(f, 0); /* Indicate end of file list */
2112
2113 #ifdef SUPPORT_HARD_LINKS
2114         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2115                 idev_destroy();
2116 #endif
2117
2118         if (show_filelist_p())
2119                 finish_filelist_progress(flist);
2120
2121         gettimeofday(&end_tv, NULL);
2122         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2123                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2124
2125         /* When converting names, both sides keep an unsorted file-list array
2126          * because the names will differ on the sending and receiving sides
2127          * (both sides will use the unsorted index number for each item). */
2128
2129         /* Sort the list without removing any duplicates.  This allows the
2130          * receiving side to ask for whatever name it kept.  For incremental
2131          * recursion mode, the sender marks duplicate dirs so that it can
2132          * send them together in a single file-list. */
2133         if (need_unsorted_flist) {
2134                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2135                         out_of_memory("send_file_list");
2136                 memcpy(flist->sorted, flist->files,
2137                        flist->used * sizeof (struct file_struct*));
2138         } else
2139                 flist->sorted = flist->files;
2140         flist_sort_and_clean(flist, 0);
2141         file_total += flist->used;
2142
2143         if (numeric_ids <= 0 && !inc_recurse)
2144                 send_id_list(f);
2145
2146         /* send the io_error flag */
2147         if (protocol_version < 30)
2148                 write_int(f, ignore_errors ? 0 : io_error);
2149         else if (io_error && !ignore_errors)
2150                 send_msg_int(MSG_IO_ERROR, io_error);
2151
2152         if (disable_buffering)
2153                 io_end_buffering_out();
2154
2155         stats.flist_size = stats.total_written - start_write;
2156         stats.num_files = flist->used;
2157
2158         if (DEBUG_GTE(FLIST, 3))
2159                 output_flist(flist);
2160
2161         if (DEBUG_GTE(FLIST, 2))
2162                 rprintf(FINFO, "send_file_list done\n");
2163
2164         if (inc_recurse) {
2165                 send_dir_depth = 1;
2166                 add_dirs_to_tree(-1, flist, dir_count);
2167                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2168                         flist->parent_ndx = -1;
2169                 flist_done_allocating(flist);
2170                 if (send_dir_ndx < 0) {
2171                         write_ndx(f, NDX_FLIST_EOF);
2172                         flist_eof = 1;
2173                 }
2174                 else if (file_total == 1) {
2175                         /* If we're creating incremental file-lists and there
2176                          * was just 1 item in the first file-list, send 1 more
2177                          * file-list to check if this is a 1-file xfer. */
2178                         send_extra_file_list(f, 1);
2179                 }
2180         }
2181
2182         return flist;
2183 }
2184
2185 struct file_list *recv_file_list(int f)
2186 {
2187         struct file_list *flist;
2188         int dstart, flags;
2189         int64 start_read;
2190
2191         if (!first_flist)
2192                 rprintf(FLOG, "receiving file list\n");
2193         if (show_filelist_p())
2194                 start_filelist_progress("receiving file list");
2195         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server && !first_flist)
2196                 rprintf(FCLIENT, "receiving incremental file list\n");
2197
2198         start_read = stats.total_read;
2199
2200 #ifdef SUPPORT_HARD_LINKS
2201         if (preserve_hard_links && !first_flist)
2202                 init_hard_links();
2203 #endif
2204
2205         flist = flist_new(0, "recv_file_list");
2206
2207         if (inc_recurse) {
2208                 if (flist->ndx_start == 1)
2209                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2210                 dstart = dir_flist->used;
2211         } else {
2212                 dir_flist = flist;
2213                 dstart = 0;
2214         }
2215
2216         while ((flags = read_byte(f)) != 0) {
2217                 struct file_struct *file;
2218
2219                 flist_expand(flist, 1);
2220
2221                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2222                         flags |= read_byte(f) << 8;
2223                 file = recv_file_entry(flist, flags, f);
2224
2225                 if (inc_recurse && S_ISDIR(file->mode)) {
2226                         flist_expand(dir_flist, 1);
2227                         dir_flist->files[dir_flist->used++] = file;
2228                 }
2229
2230                 flist->files[flist->used++] = file;
2231
2232                 maybe_emit_filelist_progress(flist->used);
2233
2234                 if (DEBUG_GTE(FLIST, 2)) {
2235                         rprintf(FINFO, "recv_file_name(%s)\n",
2236                                 f_name(file, NULL));
2237                 }
2238         }
2239         file_total += flist->used;
2240
2241         if (DEBUG_GTE(FLIST, 2))
2242                 rprintf(FINFO, "received %d names\n", flist->used);
2243
2244         if (show_filelist_p())
2245                 finish_filelist_progress(flist);
2246
2247         if (need_unsorted_flist) {
2248                 /* Create an extra array of index pointers that we can sort for
2249                  * the generator's use (for wading through the files in sorted
2250                  * order and for calling flist_find()).  We keep the "files"
2251                  * list unsorted for our exchange of index numbers with the
2252                  * other side (since their names may not sort the same). */
2253                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2254                         out_of_memory("recv_file_list");
2255                 memcpy(flist->sorted, flist->files,
2256                        flist->used * sizeof (struct file_struct*));
2257                 if (inc_recurse && dir_flist->used > dstart) {
2258                         static int dir_flist_malloced = 0;
2259                         if (dir_flist_malloced < dir_flist->malloced) {
2260                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2261                                                         struct file_struct *,
2262                                                         dir_flist->malloced);
2263                                 dir_flist_malloced = dir_flist->malloced;
2264                         }
2265                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2266                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2267                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2268                 }
2269         } else {
2270                 flist->sorted = flist->files;
2271                 if (inc_recurse && dir_flist->used > dstart) {
2272                         dir_flist->sorted = dir_flist->files;
2273                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2274                 }
2275         }
2276
2277         if (inc_recurse)
2278                 flist_done_allocating(flist);
2279         else if (f >= 0)
2280                 recv_id_list(f, flist);
2281
2282         flist_sort_and_clean(flist, relative_paths);
2283
2284         if (protocol_version < 30) {
2285                 /* Recv the io_error flag */
2286                 if (ignore_errors)
2287                         read_int(f);
2288                 else
2289                         io_error |= read_int(f);
2290         } else if (inc_recurse && flist->ndx_start == 1) {
2291                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2292                         flist->parent_ndx = -1;
2293         }
2294
2295         if (DEBUG_GTE(FLIST, 3))
2296                 output_flist(flist);
2297
2298         if (DEBUG_GTE(FLIST, 2))
2299                 rprintf(FINFO, "recv_file_list done\n");
2300
2301         stats.flist_size += stats.total_read - start_read;
2302         stats.num_files += flist->used;
2303
2304         return flist;
2305 }
2306
2307 /* This is only used once by the receiver if the very first file-list
2308  * has exactly one item in it. */
2309 void recv_additional_file_list(int f)
2310 {
2311         struct file_list *flist;
2312         int ndx = read_ndx(f);
2313         if (ndx == NDX_FLIST_EOF) {
2314                 flist_eof = 1;
2315                 change_local_filter_dir(NULL, 0, 0);
2316         } else {
2317                 ndx = NDX_FLIST_OFFSET - ndx;
2318                 if (ndx < 0 || ndx >= dir_flist->used) {
2319                         ndx = NDX_FLIST_OFFSET - ndx;
2320                         rprintf(FERROR,
2321                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2322                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2323                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2324                         exit_cleanup(RERR_PROTOCOL);
2325                 }
2326                 if (DEBUG_GTE(FLIST, 3)) {
2327                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2328                                 who_am_i(), ndx);
2329                 }
2330                 flist = recv_file_list(f);
2331                 flist->parent_ndx = ndx;
2332         }
2333 }
2334
2335 /* Search for an identically-named item in the file list.  Note that the
2336  * items must agree in their directory-ness, or no match is returned. */
2337 int flist_find(struct file_list *flist, struct file_struct *f)
2338 {
2339         int low = flist->low, high = flist->high;
2340         int diff, mid, mid_up;
2341
2342         while (low <= high) {
2343                 mid = (low + high) / 2;
2344                 if (F_IS_ACTIVE(flist->sorted[mid]))
2345                         mid_up = mid;
2346                 else {
2347                         /* Scan for the next non-empty entry using the cached
2348                          * distance values.  If the value isn't fully up-to-
2349                          * date, update it. */
2350                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2351                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2352                                 do {
2353                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2354                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2355                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2356                         }
2357                         if (mid_up > high) {
2358                                 /* If there's nothing left above us, set high to
2359                                  * a non-empty entry below us and continue. */
2360                                 high = mid - (int)flist->sorted[mid]->len32;
2361                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2362                                         do {
2363                                             high -= (int)flist->sorted[high]->len32;
2364                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2365                                         flist->sorted[mid]->len32 = mid - high;
2366                                 }
2367                                 continue;
2368                         }
2369                 }
2370                 diff = f_name_cmp(flist->sorted[mid_up], f);
2371                 if (diff == 0) {
2372                         if (protocol_version < 29
2373                             && S_ISDIR(flist->sorted[mid_up]->mode)
2374                             != S_ISDIR(f->mode))
2375                                 return -1;
2376                         return mid_up;
2377                 }
2378                 if (diff < 0)
2379                         low = mid_up + 1;
2380                 else
2381                         high = mid - 1;
2382         }
2383         return -1;
2384 }
2385
2386 /*
2387  * Free up any resources a file_struct has allocated
2388  * and clear the file.
2389  */
2390 void clear_file(struct file_struct *file)
2391 {
2392         /* The +1 zeros out the first char of the basename. */
2393         memset(file, 0, FILE_STRUCT_LEN + 1);
2394         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2395          * entry.  Likewise for len32 in the opposite direction.  We assume
2396          * that we're alone for now since flist_find() will adjust the counts
2397          * it runs into that aren't up-to-date. */
2398         file->len32 = F_DEPTH(file) = 1;
2399 }
2400
2401 /* Allocate a new file list. */
2402 struct file_list *flist_new(int flags, char *msg)
2403 {
2404         struct file_list *flist;
2405
2406         if (!(flist = new0(struct file_list)))
2407                 out_of_memory(msg);
2408
2409         if (flags & FLIST_TEMP) {
2410                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2411                                                 out_of_memory, POOL_INTERN)))
2412                         out_of_memory(msg);
2413         } else {
2414                 /* This is a doubly linked list with prev looping back to
2415                  * the end of the list, but the last next pointer is NULL. */
2416                 if (!first_flist) {
2417                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2418                                                 out_of_memory, POOL_INTERN);
2419                         if (!flist->file_pool)
2420                                 out_of_memory(msg);
2421
2422                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2423
2424                         first_flist = cur_flist = flist->prev = flist;
2425                 } else {
2426                         struct file_list *prev = first_flist->prev;
2427
2428                         flist->file_pool = first_flist->file_pool;
2429
2430                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2431                         flist->flist_num = prev->flist_num + 1;
2432
2433                         flist->prev = prev;
2434                         prev->next = first_flist->prev = flist;
2435                 }
2436                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2437                 flist_cnt++;
2438         }
2439
2440         return flist;
2441 }
2442
2443 /* Free up all elements in a flist. */
2444 void flist_free(struct file_list *flist)
2445 {
2446         if (!flist->prev) {
2447                 /* Was FLIST_TEMP dir-list. */
2448         } else if (flist == flist->prev) {
2449                 first_flist = cur_flist = NULL;
2450                 file_total = 0;
2451                 flist_cnt = 0;
2452         } else {
2453                 if (flist == cur_flist)
2454                         cur_flist = flist->next;
2455                 if (flist == first_flist)
2456                         first_flist = first_flist->next;
2457                 else {
2458                         flist->prev->next = flist->next;
2459                         if (!flist->next)
2460                                 flist->next = first_flist;
2461                 }
2462                 flist->next->prev = flist->prev;
2463                 file_total -= flist->used;
2464                 flist_cnt--;
2465         }
2466
2467         if (!flist->prev || !flist_cnt)
2468                 pool_destroy(flist->file_pool);
2469         else
2470                 pool_free_old(flist->file_pool, flist->pool_boundary);
2471
2472         if (flist->sorted && flist->sorted != flist->files)
2473                 free(flist->sorted);
2474         free(flist->files);
2475         free(flist);
2476 }
2477
2478 /* This routine ensures we don't have any duplicate names in our file list.
2479  * duplicate names can cause corruption because of the pipelining. */
2480 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2481 {
2482         char fbuf[MAXPATHLEN];
2483         int i, prev_i;
2484
2485         if (!flist)
2486                 return;
2487         if (flist->used == 0) {
2488                 flist->high = -1;
2489                 flist->low = 0;
2490                 return;
2491         }
2492
2493         fsort(flist->sorted, flist->used);
2494
2495         if (!am_sender || inc_recurse) {
2496                 for (i = prev_i = 0; i < flist->used; i++) {
2497                         if (F_IS_ACTIVE(flist->sorted[i])) {
2498                                 prev_i = i;
2499                                 break;
2500                         }
2501                 }
2502                 flist->low = prev_i;
2503         } else {
2504                 i = prev_i = flist->used - 1;
2505                 flist->low = 0;
2506         }
2507
2508         while (++i < flist->used) {
2509                 int j;
2510                 struct file_struct *file = flist->sorted[i];
2511
2512                 if (!F_IS_ACTIVE(file))
2513                         continue;
2514                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2515                         j = prev_i;
2516                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2517                         int save_mode = file->mode;
2518                         /* Make sure that this directory doesn't duplicate a
2519                          * non-directory earlier in the list. */
2520                         flist->high = prev_i;
2521                         file->mode = S_IFREG;
2522                         j = flist_find(flist, file);
2523                         file->mode = save_mode;
2524                 } else
2525                         j = -1;
2526                 if (j >= 0) {
2527                         int keep, drop;
2528                         /* If one is a dir and the other is not, we want to
2529                          * keep the dir because it might have contents in the
2530                          * list.  Otherwise keep the first one. */
2531                         if (S_ISDIR(file->mode)) {
2532                                 struct file_struct *fp = flist->sorted[j];
2533                                 if (!S_ISDIR(fp->mode))
2534                                         keep = i, drop = j;
2535                                 else {
2536                                         if (am_sender)
2537                                                 file->flags |= FLAG_DUPLICATE;
2538                                         else { /* Make sure we merge our vital flags. */
2539                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2540                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2541                                         }
2542                                         keep = j, drop = i;
2543                                 }
2544                         } else
2545                                 keep = j, drop = i;
2546
2547                         if (!am_sender) {
2548                                 if (DEBUG_GTE(DUP, 1)) {
2549                                         rprintf(FINFO,
2550                                             "removing duplicate name %s from file list (%d)\n",
2551                                             f_name(file, fbuf), drop + flist->ndx_start);
2552                                 }
2553                                 clear_file(flist->sorted[drop]);
2554                         }
2555
2556                         if (keep == i) {
2557                                 if (flist->low == drop) {
2558                                         for (j = drop + 1;
2559                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2560                                              j++) {}
2561                                         flist->low = j;
2562                                 }
2563                                 prev_i = i;
2564                         }
2565                 } else
2566                         prev_i = i;
2567         }
2568         flist->high = prev_i;
2569
2570         if (strip_root) {
2571                 /* We need to strip off the leading slashes for relative
2572                  * paths, but this must be done _after_ the sorting phase. */
2573                 for (i = flist->low; i <= flist->high; i++) {
2574                         struct file_struct *file = flist->sorted[i];
2575
2576                         if (!file->dirname)
2577                                 continue;
2578                         while (*file->dirname == '/')
2579                                 file->dirname++;
2580                         if (!*file->dirname)
2581                                 file->dirname = NULL;
2582                 }
2583         }
2584
2585         if (prune_empty_dirs && !am_sender) {
2586                 int j, prev_depth = 0;
2587
2588                 prev_i = 0; /* It's OK that this isn't really true. */
2589
2590                 for (i = flist->low; i <= flist->high; i++) {
2591                         struct file_struct *fp, *file = flist->sorted[i];
2592
2593                         /* This temporarily abuses the F_DEPTH() value for a
2594                          * directory that is in a chain that might get pruned.
2595                          * We restore the old value if it gets a reprieve. */
2596                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2597                                 /* Dump empty dirs when coming back down. */
2598                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2599                                         fp = flist->sorted[prev_i];
2600                                         if (F_DEPTH(fp) >= 0)
2601                                                 break;
2602                                         prev_i = -F_DEPTH(fp)-1;
2603                                         clear_file(fp);
2604                                 }
2605                                 prev_depth = F_DEPTH(file);
2606                                 if (is_excluded(f_name(file, fbuf), 1,
2607                                                        ALL_FILTERS)) {
2608                                         /* Keep dirs through this dir. */
2609                                         for (j = prev_depth-1; ; j--) {
2610                                                 fp = flist->sorted[prev_i];
2611                                                 if (F_DEPTH(fp) >= 0)
2612                                                         break;
2613                                                 prev_i = -F_DEPTH(fp)-1;
2614                                                 F_DEPTH(fp) = j;
2615                                         }
2616                                 } else
2617                                         F_DEPTH(file) = -prev_i-1;
2618                                 prev_i = i;
2619                         } else {
2620                                 /* Keep dirs through this non-dir. */
2621                                 for (j = prev_depth; ; j--) {
2622                                         fp = flist->sorted[prev_i];
2623                                         if (F_DEPTH(fp) >= 0)
2624                                                 break;
2625                                         prev_i = -F_DEPTH(fp)-1;
2626                                         F_DEPTH(fp) = j;
2627                                 }
2628                         }
2629                 }
2630                 /* Dump all remaining empty dirs. */
2631                 while (1) {
2632                         struct file_struct *fp = flist->sorted[prev_i];
2633                         if (F_DEPTH(fp) >= 0)
2634                                 break;
2635                         prev_i = -F_DEPTH(fp)-1;
2636                         clear_file(fp);
2637                 }
2638
2639                 for (i = flist->low; i <= flist->high; i++) {
2640                         if (F_IS_ACTIVE(flist->sorted[i]))
2641                                 break;
2642                 }
2643                 flist->low = i;
2644                 for (i = flist->high; i >= flist->low; i--) {
2645                         if (F_IS_ACTIVE(flist->sorted[i]))
2646                                 break;
2647                 }
2648                 flist->high = i;
2649         }
2650 }
2651
2652 static void output_flist(struct file_list *flist)
2653 {
2654         char uidbuf[16], gidbuf[16], depthbuf[16];
2655         struct file_struct *file;
2656         const char *root, *dir, *slash, *name, *trail;
2657         const char *who = who_am_i();
2658         int i;
2659
2660         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2661                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2662         for (i = 0; i < flist->used; i++) {
2663                 file = flist->files[i];
2664                 if ((am_root || am_sender) && uid_ndx) {
2665                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2666                                  F_OWNER(file));
2667                 } else
2668                         *uidbuf = '\0';
2669                 if (gid_ndx) {
2670                         static char parens[] = "(\0)\0\0\0";
2671                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2672                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2673                                  pp, F_GROUP(file), pp + 2);
2674                 } else
2675                         *gidbuf = '\0';
2676                 if (!am_sender)
2677                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2678                 if (F_IS_ACTIVE(file)) {
2679                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2680                         if ((dir = file->dirname) == NULL)
2681                                 dir = slash = "";
2682                         else
2683                                 slash = "/";
2684                         name = file->basename;
2685                         trail = S_ISDIR(file->mode) ? "/" : "";
2686                 } else
2687                         root = dir = slash = name = trail = "";
2688                 rprintf(FINFO,
2689                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2690                         who, i + flist->ndx_start,
2691                         root, dir, slash, name, trail,
2692                         (int)file->mode, (double)F_LENGTH(file),
2693                         uidbuf, gidbuf, file->flags);
2694         }
2695 }
2696
2697 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2698 enum fnc_type { t_PATH, t_ITEM };
2699
2700 static int found_prefix;
2701
2702 /* Compare the names of two file_struct entities, similar to how strcmp()
2703  * would do if it were operating on the joined strings.
2704  *
2705  * Some differences beginning with protocol_version 29: (1) directory names
2706  * are compared with an assumed trailing slash so that they compare in a
2707  * way that would cause them to sort immediately prior to any content they
2708  * may have; (2) a directory of any name compares after a non-directory of
2709  * any name at the same depth; (3) a directory with name "." compares prior
2710  * to anything else.  These changes mean that a directory and a non-dir
2711  * with the same name will not compare as equal (protocol_version >= 29).
2712  *
2713  * The dirname component can be an empty string, but the basename component
2714  * cannot (and never is in the current codebase).  The basename component
2715  * may be NULL (for a removed item), in which case it is considered to be
2716  * after any existing item. */
2717 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2718 {
2719         int dif;
2720         const uchar *c1, *c2;
2721         enum fnc_state state1, state2;
2722         enum fnc_type type1, type2;
2723         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2724
2725         if (!f1 || !F_IS_ACTIVE(f1)) {
2726                 if (!f2 || !F_IS_ACTIVE(f2))
2727                         return 0;
2728                 return -1;
2729         }
2730         if (!f2 || !F_IS_ACTIVE(f2))
2731                 return 1;
2732
2733         c1 = (uchar*)f1->dirname;
2734         c2 = (uchar*)f2->dirname;
2735         if (c1 == c2)
2736                 c1 = c2 = NULL;
2737         if (!c1) {
2738                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2739                 c1 = (const uchar*)f1->basename;
2740                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2741                         type1 = t_ITEM;
2742                         state1 = s_TRAILING;
2743                         c1 = (uchar*)"";
2744                 } else
2745                         state1 = s_BASE;
2746         } else {
2747                 type1 = t_path;
2748                 state1 = s_DIR;
2749         }
2750         if (!c2) {
2751                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2752                 c2 = (const uchar*)f2->basename;
2753                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2754                         type2 = t_ITEM;
2755                         state2 = s_TRAILING;
2756                         c2 = (uchar*)"";
2757                 } else
2758                         state2 = s_BASE;
2759         } else {
2760                 type2 = t_path;
2761                 state2 = s_DIR;
2762         }
2763
2764         if (type1 != type2)
2765                 return type1 == t_PATH ? 1 : -1;
2766
2767         do {
2768                 if (!*c1) {
2769                         switch (state1) {
2770                         case s_DIR:
2771                                 state1 = s_SLASH;
2772                                 c1 = (uchar*)"/";
2773                                 break;
2774                         case s_SLASH:
2775                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2776                                 c1 = (const uchar*)f1->basename;
2777                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2778                                         type1 = t_ITEM;
2779                                         state1 = s_TRAILING;
2780                                         c1 = (uchar*)"";
2781                                 } else
2782                                         state1 = s_BASE;
2783                                 break;
2784                         case s_BASE:
2785                                 state1 = s_TRAILING;
2786                                 if (type1 == t_PATH) {
2787                                         c1 = (uchar*)"/";
2788                                         break;
2789                                 }
2790                                 /* FALL THROUGH */
2791                         case s_TRAILING:
2792                                 type1 = t_ITEM;
2793                                 break;
2794                         }
2795                         if (*c2 && type1 != type2)
2796                                 return type1 == t_PATH ? 1 : -1;
2797                 }
2798                 if (!*c2) {
2799                         switch (state2) {
2800                         case s_DIR:
2801                                 state2 = s_SLASH;
2802                                 c2 = (uchar*)"/";
2803                                 break;
2804                         case s_SLASH:
2805                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2806                                 c2 = (const uchar*)f2->basename;
2807                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2808                                         type2 = t_ITEM;
2809                                         state2 = s_TRAILING;
2810                                         c2 = (uchar*)"";
2811                                 } else
2812                                         state2 = s_BASE;
2813                                 break;
2814                         case s_BASE:
2815                                 state2 = s_TRAILING;
2816                                 if (type2 == t_PATH) {
2817                                         c2 = (uchar*)"/";
2818                                         break;
2819                                 }
2820                                 /* FALL THROUGH */
2821                         case s_TRAILING:
2822                                 found_prefix = 1;
2823                                 if (!*c1)
2824                                         return 0;
2825                                 type2 = t_ITEM;
2826                                 break;
2827                         }
2828                         if (type1 != type2)
2829                                 return type1 == t_PATH ? 1 : -1;
2830                 }
2831         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2832
2833         return dif;
2834 }
2835
2836 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2837  * not match if f2's basename is not an exact match of a path element in f1.
2838  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2839 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2840 {
2841         found_prefix = 0;
2842         f_name_cmp(f1, f2);
2843         return found_prefix;
2844 }
2845
2846 char *f_name_buf(void)
2847 {
2848         static char names[5][MAXPATHLEN];
2849         static unsigned int n;
2850
2851         n = (n + 1) % (sizeof names / sizeof names[0]);
2852
2853         return names[n];
2854 }
2855
2856 /* Return a copy of the full filename of a flist entry, using the indicated
2857  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2858  * done because we checked the size when creating the file_struct entry.
2859  */
2860 char *f_name(const struct file_struct *f, char *fbuf)
2861 {
2862         if (!f || !F_IS_ACTIVE(f))
2863                 return NULL;
2864
2865         if (!fbuf)
2866                 fbuf = f_name_buf();
2867
2868         if (f->dirname) {
2869                 int len = strlen(f->dirname);
2870                 memcpy(fbuf, f->dirname, len);
2871                 fbuf[len] = '/';
2872                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2873         } else
2874                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2875
2876         return fbuf;
2877 }
2878
2879 /* Do a non-recursive scan of the named directory, possibly ignoring all
2880  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2881  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2882  * buffer (the functions we call will append names onto the end, but the old
2883  * dir value will be restored on exit). */
2884 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2885 {
2886         struct file_list *dirlist;
2887         char dirbuf[MAXPATHLEN];
2888         int save_recurse = recurse;
2889         int save_xfer_dirs = xfer_dirs;
2890         int save_prune_empty_dirs = prune_empty_dirs;
2891
2892         if (dlen < 0) {
2893                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2894                 if (dlen >= MAXPATHLEN)
2895                         return NULL;
2896                 dirname = dirbuf;
2897         }
2898
2899         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2900
2901         recurse = 0;
2902         xfer_dirs = 1;
2903         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2904         xfer_dirs = save_xfer_dirs;
2905         recurse = save_recurse;
2906         if (INFO_GTE(PROGRESS, 1))
2907                 flist_count_offset += dirlist->used;
2908
2909         prune_empty_dirs = 0;
2910         dirlist->sorted = dirlist->files;
2911         flist_sort_and_clean(dirlist, 0);
2912         prune_empty_dirs = save_prune_empty_dirs;
2913
2914         if (DEBUG_GTE(FLIST, 3))
2915                 output_flist(dirlist);
2916
2917         return dirlist;
2918 }