a09702163082c4b5cbb49b67996e6288d79c8d1c
[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) 2002-2007 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 verbose;
29 extern int am_root;
30 extern int am_server;
31 extern int am_daemon;
32 extern int am_sender;
33 extern int am_generator;
34 extern int inc_recurse;
35 extern int do_progress;
36 extern int always_checksum;
37 extern int module_id;
38 extern int ignore_errors;
39 extern int numeric_ids;
40 extern int recurse;
41 extern int use_qsort;
42 extern int xfer_dirs;
43 extern int filesfrom_fd;
44 extern int one_file_system;
45 extern int copy_dirlinks;
46 extern int keep_dirlinks;
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 unsort_ndx;
69 extern struct stats stats;
70 extern char *filesfrom_host;
71
72 extern char curr_dir[MAXPATHLEN];
73
74 extern struct chmod_mode_struct *chmod_modes;
75
76 extern struct filter_list_struct filter_list;
77 extern struct filter_list_struct server_filter_list;
78
79 #ifdef ICONV_OPTION
80 extern int filesfrom_convert;
81 extern iconv_t ic_send, ic_recv;
82 #endif
83
84 #define PTR_SIZE (sizeof (struct file_struct *))
85
86 int io_error;
87 int checksum_len;
88 dev_t filesystem_dev; /* used to implement -x */
89
90 struct file_list *cur_flist, *first_flist, *dir_flist;
91 int send_dir_ndx = -1, send_dir_depth = -1;
92 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
93 int file_total = 0; /* total of all active items over all file-lists */
94 int flist_eof = 0; /* all the file-lists are now known */
95
96 #define NORMAL_NAME 0
97 #define SLASH_ENDING_NAME 1
98 #define DOT_NAME 2
99
100 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
101  * internally, even if this platform does not allow files to have 64-bit inums.
102  * The only exception is if we're on a platform with no 64-bit type at all.
103  *
104  * Because we use read_longint() to get these off the wire, if you transfer
105  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
106  * machine with no 64-bit types then you will get an overflow error.
107  *
108  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
109  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
110  * be truncated.  But it's a kind of silly thing to do anyhow. */
111
112 /* The tmp_* vars are used as a cache area by make_file() to store data
113  * that the sender doesn't need to remember in its file list.  The data
114  * will survive just long enough to be used by send_file_entry(). */
115 static dev_t tmp_rdev;
116 #ifdef SUPPORT_HARD_LINKS
117 static int64 tmp_dev, tmp_ino;
118 #endif
119 static char tmp_sum[MAX_DIGEST_LEN];
120
121 static char empty_sum[MAX_DIGEST_LEN];
122 static int flist_count_offset; /* for --delete --progress */
123 static int dir_count = 0;
124
125 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
126 static void output_flist(struct file_list *flist);
127
128 void init_flist(void)
129 {
130         if (verbose > 4) {
131                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
132                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
133         }
134         checksum_len = protocol_version < 21 ? 2
135                      : protocol_version < 30 ? MD4_DIGEST_LEN
136                      : MD5_DIGEST_LEN;
137 }
138
139 static int show_filelist_p(void)
140 {
141         return verbose && xfer_dirs && !am_server && !inc_recurse;
142 }
143
144 static void start_filelist_progress(char *kind)
145 {
146         rprintf(FCLIENT, "%s ... ", kind);
147         if (verbose > 1 || do_progress)
148                 rprintf(FCLIENT, "\n");
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 (do_progress && 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 (do_progress) {
166                 /* This overwrites the progress line */
167                 rprintf(FINFO, "%d file%sto consider\n",
168                         flist->used, flist->used == 1 ? " " : "s ");
169         } else
170                 rprintf(FINFO, "done\n");
171 }
172
173 void show_flist_stats(void)
174 {
175         /* Nothing yet */
176 }
177
178 /* Stat either a symlink or its referent, depending on the settings of
179  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
180  *
181  * If path is the name of a symlink, then the linkbuf buffer (which must hold
182  * MAXPATHLEN chars) will be set to the symlink's target string.
183  *
184  * The stat structure pointed to by stp will contain information about the
185  * link or the referent as appropriate, if they exist. */
186 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
187 {
188 #ifdef SUPPORT_LINKS
189         if (link_stat(path, stp, copy_dirlinks) < 0)
190                 return -1;
191         if (S_ISLNK(stp->st_mode)) {
192                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
193                 if (llen < 0)
194                         return -1;
195                 linkbuf[llen] = '\0';
196                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
197                         if (verbose > 1) {
198                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
199                                         path, linkbuf);
200                         }
201                         return x_stat(path, stp, NULL);
202                 }
203                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
204                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
205                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
206                                 llen - SYMLINK_PREFIX_LEN + 1);
207                 }
208         }
209         return 0;
210 #else
211         return x_stat(path, stp, NULL);
212 #endif
213 }
214
215 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
216 {
217 #ifdef SUPPORT_LINKS
218         if (copy_links)
219                 return x_stat(path, stp, NULL);
220         if (x_lstat(path, stp, NULL) < 0)
221                 return -1;
222         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
223                 STRUCT_STAT st;
224                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
225                         *stp = st;
226         }
227         return 0;
228 #else
229         return x_stat(path, stp, NULL);
230 #endif
231 }
232
233 /* This function is used to check if a file should be included/excluded
234  * from the list of files based on its name and type etc.  The value of
235  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
236 static int is_excluded(char *fname, int is_dir, int filter_level)
237 {
238 #if 0 /* This currently never happens, so avoid a useless compare. */
239         if (filter_level == NO_FILTERS)
240                 return 0;
241 #endif
242         if (fname) {
243                 /* never exclude '.', even if somebody does --exclude '*' */
244                 if (fname[0] == '.' && !fname[1])
245                         return 0;
246                 /* Handle the -R version of the '.' dir. */
247                 if (fname[0] == '/') {
248                         int len = strlen(fname);
249                         if (fname[len-1] == '.' && fname[len-2] == '/')
250                                 return 0;
251                 }
252         }
253         if (server_filter_list.head
254             && check_filter(&server_filter_list, fname, is_dir) < 0)
255                 return 1;
256         if (filter_level != ALL_FILTERS)
257                 return 0;
258         if (filter_list.head
259             && check_filter(&filter_list, fname, is_dir) < 0)
260                 return 1;
261         return 0;
262 }
263
264 static void send_directory(int f, struct file_list *flist,
265                            char *fbuf, int len, int flags);
266
267 static const char *pathname, *orig_dir;
268 static int pathname_len;
269
270
271 /* Make sure flist can hold at least flist->used + extra entries. */
272 static void flist_expand(struct file_list *flist, int extra)
273 {
274         struct file_struct **new_ptr;
275
276         if (flist->used + extra <= flist->malloced)
277                 return;
278
279         if (flist->malloced < FLIST_START)
280                 flist->malloced = FLIST_START;
281         else if (flist->malloced >= FLIST_LINEAR)
282                 flist->malloced += FLIST_LINEAR;
283         else
284                 flist->malloced *= 2;
285
286         /* In case count jumped or we are starting the list
287          * with a known size just set it. */
288         if (flist->malloced < flist->used + extra)
289                 flist->malloced = flist->used + extra;
290
291         new_ptr = realloc_array(flist->files, struct file_struct *,
292                                 flist->malloced);
293
294         if (verbose >= 2 && flist->malloced != FLIST_START) {
295                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
296                     who_am_i(),
297                     (double)sizeof flist->files[0] * flist->malloced,
298                     (new_ptr == flist->files) ? " not" : "");
299         }
300
301         flist->files = new_ptr;
302
303         if (!flist->files)
304                 out_of_memory("flist_expand");
305 }
306
307 static void flist_done_allocating(struct file_list *flist)
308 {
309         void *ptr = pool_boundary(flist->file_pool, 8*1024);
310         if (flist->pool_boundary == ptr)
311                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
312         else
313                 flist->pool_boundary = ptr;
314 }
315
316 int push_pathname(const char *dir, int len)
317 {
318         if (dir == pathname)
319                 return 1;
320
321         if (!orig_dir)
322                 orig_dir = strdup(curr_dir);
323
324         if (pathname && !pop_dir(orig_dir)) {
325                 rsyserr(FERROR, errno, "pop_dir %s failed",
326                         full_fname(orig_dir));
327                 exit_cleanup(RERR_FILESELECT);
328         }
329
330         if (dir && !push_dir(dir, 0)) {
331                 io_error |= IOERR_GENERAL;
332                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
333                         full_fname(dir), curr_dir);
334                 return 0;
335         }
336
337         pathname = dir;
338         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
339
340         return 1;
341 }
342
343 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
344 {
345         static time_t modtime;
346         static mode_t mode;
347 #ifdef SUPPORT_HARD_LINKS
348         static int64 dev;
349 #endif
350         static dev_t rdev;
351         static uint32 rdev_major;
352         static uid_t uid;
353         static gid_t gid;
354         static const char *user_name, *group_name;
355         static char lastname[MAXPATHLEN];
356         char fname[MAXPATHLEN];
357         int first_hlink_ndx = -1;
358         int l1, l2;
359         int xflags;
360
361 #ifdef ICONV_OPTION
362         if (ic_send != (iconv_t)-1) {
363                 xbuf outbuf, inbuf;
364
365                 INIT_CONST_XBUF(outbuf, fname);
366
367                 if (file->dirname) {
368                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
369                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
370                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
371                                 goto convert_error;
372                         outbuf.size += 2;
373                         outbuf.buf[outbuf.len++] = '/';
374                 }
375
376                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
377                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
378                   convert_error:
379                         io_error |= IOERR_GENERAL;
380                         rprintf(FINFO,
381                             "[%s] cannot convert filename: %s (%s)\n",
382                             who_am_i(), f_name(file, fname), strerror(errno));
383                         return;
384                 }
385                 outbuf.buf[outbuf.len] = '\0';
386         } else
387 #endif
388                 f_name(file, fname);
389
390         /* Initialize starting value of xflags. */
391         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
392                 dir_count++;
393                 if (file->flags & FLAG_CONTENT_DIR)
394                         xflags = file->flags & FLAG_TOP_DIR;
395                 else if (file->flags & FLAG_IMPLIED_DIR)
396                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
397                 else
398                         xflags = XMIT_NO_CONTENT_DIR;
399         } else
400                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
401
402         if (file->mode == mode)
403                 xflags |= XMIT_SAME_MODE;
404         else
405                 mode = file->mode;
406
407         if ((preserve_devices && IS_DEVICE(mode))
408          || (preserve_specials && IS_SPECIAL(mode))) {
409                 if (protocol_version < 28) {
410                         if (tmp_rdev == rdev)
411                                 xflags |= XMIT_SAME_RDEV_pre28;
412                         else
413                                 rdev = tmp_rdev;
414                 } else {
415                         rdev = tmp_rdev;
416                         if ((uint32)major(rdev) == rdev_major)
417                                 xflags |= XMIT_SAME_RDEV_MAJOR;
418                         else
419                                 rdev_major = major(rdev);
420                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
421                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
422                 }
423         } else if (protocol_version < 28)
424                 rdev = MAKEDEV(0, 0);
425         if (uid_ndx) {
426                 if ((uid_t)F_OWNER(file) == uid && *lastname)
427                         xflags |= XMIT_SAME_UID;
428                 else {
429                         uid = F_OWNER(file);
430                         if (uid_ndx && !numeric_ids) {
431                                 user_name = add_uid(uid);
432                                 if (inc_recurse && user_name)
433                                         xflags |= XMIT_USER_NAME_FOLLOWS;
434                         }
435                 }
436         }
437         if (gid_ndx) {
438                 if ((gid_t)F_GROUP(file) == gid && *lastname)
439                         xflags |= XMIT_SAME_GID;
440                 else {
441                         gid = F_GROUP(file);
442                         if (gid_ndx && !numeric_ids) {
443                                 group_name = add_gid(gid);
444                                 if (inc_recurse && group_name)
445                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
446                         }
447                 }
448         }
449         if (file->modtime == modtime)
450                 xflags |= XMIT_SAME_TIME;
451         else
452                 modtime = file->modtime;
453
454 #ifdef SUPPORT_HARD_LINKS
455         if (tmp_dev != 0) {
456                 if (protocol_version >= 30) {
457                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
458                         first_hlink_ndx = (int32)(long)np->data - 1;
459                         if (first_hlink_ndx < 0) {
460                                 np->data = (void*)(long)(first_ndx + ndx + 1);
461                                 xflags |= XMIT_HLINK_FIRST;
462                         }
463                         xflags |= XMIT_HLINKED;
464                 } else {
465                         if (tmp_dev == dev) {
466                                 if (protocol_version >= 28)
467                                         xflags |= XMIT_SAME_DEV_pre30;
468                         } else
469                                 dev = tmp_dev;
470                         xflags |= XMIT_HLINKED;
471                 }
472         }
473 #endif
474
475         for (l1 = 0;
476             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
477             l1++) {}
478         l2 = strlen(fname+l1);
479
480         if (l1 > 0)
481                 xflags |= XMIT_SAME_NAME;
482         if (l2 > 255)
483                 xflags |= XMIT_LONG_NAME;
484
485         /* We must make sure we don't send a zero flag byte or the
486          * other end will terminate the flist transfer.  Note that
487          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
488          * it's harmless way to add a bit to the first flag byte. */
489         if (protocol_version >= 28) {
490                 if (!xflags && !S_ISDIR(mode))
491                         xflags |= XMIT_TOP_DIR;
492                 if ((xflags & 0xFF00) || !xflags) {
493                         xflags |= XMIT_EXTENDED_FLAGS;
494                         write_shortint(f, xflags);
495                 } else
496                         write_byte(f, xflags);
497         } else {
498                 if (!(xflags & 0xFF))
499                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
500                 write_byte(f, xflags);
501         }
502         if (xflags & XMIT_SAME_NAME)
503                 write_byte(f, l1);
504         if (xflags & XMIT_LONG_NAME)
505                 write_varint30(f, l2);
506         else
507                 write_byte(f, l2);
508         write_buf(f, fname + l1, l2);
509
510         if (first_hlink_ndx >= 0) {
511                 write_varint(f, first_hlink_ndx);
512                 if (first_hlink_ndx >= first_ndx)
513                         goto the_end;
514         }
515
516         write_varlong30(f, F_LENGTH(file), 3);
517         if (!(xflags & XMIT_SAME_TIME)) {
518                 if (protocol_version >= 30)
519                         write_varlong(f, modtime, 4);
520                 else
521                         write_int(f, modtime);
522         }
523         if (!(xflags & XMIT_SAME_MODE))
524                 write_int(f, to_wire_mode(mode));
525         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
526                 if (protocol_version < 30)
527                         write_int(f, uid);
528                 else {
529                         write_varint(f, uid);
530                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
531                                 int len = strlen(user_name);
532                                 write_byte(f, len);
533                                 write_buf(f, user_name, len);
534                         }
535                 }
536         }
537         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
538                 if (protocol_version < 30)
539                         write_int(f, gid);
540                 else {
541                         write_varint(f, gid);
542                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
543                                 int len = strlen(group_name);
544                                 write_byte(f, len);
545                                 write_buf(f, group_name, len);
546                         }
547                 }
548         }
549         if ((preserve_devices && IS_DEVICE(mode))
550          || (preserve_specials && IS_SPECIAL(mode))) {
551                 if (protocol_version < 28) {
552                         if (!(xflags & XMIT_SAME_RDEV_pre28))
553                                 write_int(f, (int)rdev);
554                 } else {
555                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
556                                 write_varint30(f, major(rdev));
557                         if (protocol_version >= 30)
558                                 write_varint(f, minor(rdev));
559                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
560                                 write_byte(f, minor(rdev));
561                         else
562                                 write_int(f, minor(rdev));
563                 }
564         }
565
566 #ifdef SUPPORT_LINKS
567         if (preserve_links && S_ISLNK(mode)) {
568                 const char *sl = F_SYMLINK(file);
569                 int len = strlen(sl);
570                 write_varint30(f, len);
571                 write_buf(f, sl, len);
572         }
573 #endif
574
575 #ifdef SUPPORT_HARD_LINKS
576         if (tmp_dev != 0 && protocol_version < 30) {
577                 if (protocol_version < 26) {
578                         /* 32-bit dev_t and ino_t */
579                         write_int(f, (int32)dev);
580                         write_int(f, (int32)tmp_ino);
581                 } else {
582                         /* 64-bit dev_t and ino_t */
583                         if (!(xflags & XMIT_SAME_DEV_pre30))
584                                 write_longint(f, dev);
585                         write_longint(f, tmp_ino);
586                 }
587         }
588 #endif
589
590         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
591                 const char *sum;
592                 if (S_ISREG(mode))
593                         sum = tmp_sum;
594                 else {
595                         /* Prior to 28, we sent a useless set of nulls. */
596                         sum = empty_sum;
597                 }
598                 write_buf(f, sum, checksum_len);
599         }
600
601   the_end:
602         strlcpy(lastname, fname, MAXPATHLEN);
603
604         if (S_ISREG(mode) || S_ISLNK(mode))
605                 stats.total_size += F_LENGTH(file);
606 }
607
608 static struct file_struct *recv_file_entry(struct file_list *flist,
609                                            int xflags, int f)
610 {
611         static int64 modtime;
612         static mode_t mode;
613 #ifdef SUPPORT_HARD_LINKS
614         static int64 dev;
615 #endif
616         static dev_t rdev;
617         static uint32 rdev_major;
618         static uid_t uid;
619         static gid_t gid;
620         static uint16 gid_flags;
621         static char lastname[MAXPATHLEN], *lastdir;
622         static int lastdir_depth, lastdir_len = -1;
623         static unsigned int del_hier_name_len = 0;
624         static int in_del_hier = 0;
625         char thisname[MAXPATHLEN];
626         unsigned int l1 = 0, l2 = 0;
627         int alloc_len, basename_len, linkname_len;
628         int extra_len = file_extra_cnt * EXTRA_LEN;
629         int first_hlink_ndx = -1;
630         OFF_T file_length;
631         const char *basename;
632         struct file_struct *file;
633         alloc_pool_t *pool;
634         char *bp;
635
636         if (xflags & XMIT_SAME_NAME)
637                 l1 = read_byte(f);
638
639         if (xflags & XMIT_LONG_NAME)
640                 l2 = read_varint30(f);
641         else
642                 l2 = read_byte(f);
643
644         if (l2 >= MAXPATHLEN - l1) {
645                 rprintf(FERROR,
646                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
647                         xflags, l1, l2, lastname, who_am_i());
648                 overflow_exit("recv_file_entry");
649         }
650
651         strlcpy(thisname, lastname, l1 + 1);
652         read_sbuf(f, &thisname[l1], l2);
653         thisname[l1 + l2] = 0;
654
655         /* Abuse basename_len for a moment... */
656         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
657
658 #ifdef ICONV_OPTION
659         if (ic_recv != (iconv_t)-1) {
660                 xbuf outbuf, inbuf;
661
662                 INIT_CONST_XBUF(outbuf, thisname);
663                 INIT_XBUF(inbuf, lastname, basename_len, -1);
664
665                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
666                         io_error |= IOERR_GENERAL;
667                         rprintf(FINFO,
668                             "[%s] cannot convert filename: %s (%s)\n",
669                             who_am_i(), lastname, strerror(errno));
670                         outbuf.len = 0;
671                 }
672                 outbuf.buf[outbuf.len] = '\0';
673         }
674 #endif
675
676         clean_fname(thisname, 0);
677
678         if (sanitize_paths)
679                 sanitize_path(thisname, thisname, "", 0);
680
681         if ((basename = strrchr(thisname, '/')) != NULL) {
682                 int len = basename++ - thisname;
683                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
684                         lastdir = new_array(char, len + 1);
685                         memcpy(lastdir, thisname, len);
686                         lastdir[len] = '\0';
687                         lastdir_len = len;
688                         lastdir_depth = count_dir_elements(lastdir);
689                 }
690         } else
691                 basename = thisname;
692         basename_len = strlen(basename) + 1; /* count the '\0' */
693
694 #ifdef SUPPORT_HARD_LINKS
695         if (protocol_version >= 30
696          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
697                 first_hlink_ndx = read_varint(f);
698                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
699                         rprintf(FERROR,
700                                 "hard-link reference out of range: %d (%d)\n",
701                                 first_hlink_ndx, flist->ndx_start + flist->used);
702                         exit_cleanup(RERR_PROTOCOL);
703                 }
704                 if (first_hlink_ndx >= flist->ndx_start) {
705                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
706                         file_length = F_LENGTH(first);
707                         modtime = first->modtime;
708                         mode = first->mode;
709                         if (uid_ndx)
710                                 uid = F_OWNER(first);
711                         if (gid_ndx)
712                                 gid = F_GROUP(first);
713                         if ((preserve_devices && IS_DEVICE(mode))
714                          || (preserve_specials && IS_SPECIAL(mode))) {
715                                 uint32 *devp = F_RDEV_P(first);
716                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
717                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
718                         }
719                         if (preserve_links && S_ISLNK(mode))
720                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
721                         else
722                                 linkname_len = 0;
723                         goto create_object;
724                 }
725         }
726 #endif
727
728         file_length = read_varlong30(f, 3);
729         if (!(xflags & XMIT_SAME_TIME)) {
730                 if (protocol_version >= 30) {
731                         modtime = read_varlong(f, 4);
732 #if SIZEOF_TIME_T < SIZEOF_INT64
733                         if (!am_generator && (int64)(time_t)modtime != modtime) {
734                                 rprintf(FERROR_XFER,
735                                     "Time value of %s truncated on receiver.\n",
736                                     lastname);
737                         }
738 #endif
739                 } else
740                         modtime = read_int(f);
741         }
742         if (!(xflags & XMIT_SAME_MODE))
743                 mode = from_wire_mode(read_int(f));
744
745         if (chmod_modes && !S_ISLNK(mode))
746                 mode = tweak_mode(mode, chmod_modes);
747
748         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
749                 if (protocol_version < 30)
750                         uid = (uid_t)read_int(f);
751                 else {
752                         uid = (uid_t)read_varint(f);
753                         if (xflags & XMIT_USER_NAME_FOLLOWS)
754                                 uid = recv_user_name(f, uid);
755                         else if (inc_recurse && am_root && !numeric_ids)
756                                 uid = match_uid(uid);
757                 }
758         }
759         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
760                 if (protocol_version < 30)
761                         gid = (gid_t)read_int(f);
762                 else {
763                         gid = (gid_t)read_varint(f);
764                         gid_flags = 0;
765                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
766                                 gid = recv_group_name(f, gid, &gid_flags);
767                         else if (inc_recurse && (!am_root || !numeric_ids))
768                                 gid = match_gid(gid, &gid_flags);
769                 }
770         }
771
772         if ((preserve_devices && IS_DEVICE(mode))
773          || (preserve_specials && IS_SPECIAL(mode))) {
774                 if (protocol_version < 28) {
775                         if (!(xflags & XMIT_SAME_RDEV_pre28))
776                                 rdev = (dev_t)read_int(f);
777                 } else {
778                         uint32 rdev_minor;
779                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
780                                 rdev_major = read_varint30(f);
781                         if (protocol_version >= 30)
782                                 rdev_minor = read_varint(f);
783                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
784                                 rdev_minor = read_byte(f);
785                         else
786                                 rdev_minor = read_int(f);
787                         rdev = MAKEDEV(rdev_major, rdev_minor);
788                 }
789                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
790                 file_length = 0;
791         } else if (protocol_version < 28)
792                 rdev = MAKEDEV(0, 0);
793
794 #ifdef SUPPORT_LINKS
795         if (preserve_links && S_ISLNK(mode)) {
796                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
797                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
798                         rprintf(FERROR, "overflow: linkname_len=%d\n",
799                                 linkname_len - 1);
800                         overflow_exit("recv_file_entry");
801                 }
802                 if (munge_symlinks)
803                         linkname_len += SYMLINK_PREFIX_LEN;
804         }
805         else
806 #endif
807                 linkname_len = 0;
808
809 #ifdef SUPPORT_HARD_LINKS
810   create_object:
811         if (preserve_hard_links) {
812                 if (protocol_version < 28 && S_ISREG(mode))
813                         xflags |= XMIT_HLINKED;
814                 if (xflags & XMIT_HLINKED)
815                         extra_len += (inc_recurse+1) * EXTRA_LEN;
816         }
817 #endif
818
819 #ifdef SUPPORT_ACLS
820         /* We need one or two index int32s when we're preserving ACLs. */
821         if (preserve_acls)
822                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
823 #endif
824
825         if (always_checksum && S_ISREG(mode))
826                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
827
828         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
829                 extra_len += EXTRA_LEN;
830
831         if (inc_recurse && S_ISDIR(mode)) {
832                 if (one_file_system) {
833                         /* Room to save the dir's device for -x */
834                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
835                 }
836                 pool = dir_flist->file_pool;
837         } else
838                 pool = flist->file_pool;
839
840 #if EXTRA_ROUNDING > 0
841         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
842                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
843 #endif
844
845         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
846                   + linkname_len;
847         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
848
849         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
850         bp += extra_len;
851         file = (struct file_struct *)bp;
852         bp += FILE_STRUCT_LEN;
853
854         memcpy(bp, basename, basename_len);
855         bp += basename_len + linkname_len; /* skip space for symlink too */
856
857 #ifdef SUPPORT_HARD_LINKS
858         if (xflags & XMIT_HLINKED)
859                 file->flags |= FLAG_HLINKED;
860 #endif
861         file->modtime = (time_t)modtime;
862         file->len32 = (uint32)file_length;
863         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
864                 file->flags |= FLAG_LENGTH64;
865                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
866         }
867         file->mode = mode;
868         if (uid_ndx)
869                 F_OWNER(file) = uid;
870         if (gid_ndx) {
871                 F_GROUP(file) = gid;
872                 file->flags |= gid_flags;
873         }
874         if (unsort_ndx)
875                 F_NDX(file) = flist->used + flist->ndx_start;
876
877         if (basename != thisname) {
878                 file->dirname = lastdir;
879                 F_DEPTH(file) = lastdir_depth + 1;
880         } else
881                 F_DEPTH(file) = 1;
882
883         if (S_ISDIR(mode)) {
884                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
885                         F_DEPTH(file)--;
886                 if (protocol_version >= 30) {
887                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
888                                 if (xflags & XMIT_TOP_DIR)
889                                         file->flags |= FLAG_TOP_DIR;
890                                 file->flags |= FLAG_CONTENT_DIR;
891                         } else if (xflags & XMIT_TOP_DIR)
892                                 file->flags |= FLAG_IMPLIED_DIR;
893                 } else if (xflags & XMIT_TOP_DIR) {
894                         in_del_hier = recurse;
895                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
896                         if (relative_paths && del_hier_name_len > 2
897                             && lastname[del_hier_name_len-1] == '.'
898                             && lastname[del_hier_name_len-2] == '/')
899                                 del_hier_name_len -= 2;
900                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
901                 } else if (in_del_hier) {
902                         if (!relative_paths || !del_hier_name_len
903                          || (l1 >= del_hier_name_len
904                           && lastname[del_hier_name_len] == '/'))
905                                 file->flags |= FLAG_CONTENT_DIR;
906                         else
907                                 in_del_hier = 0;
908                 }
909         }
910
911         if ((preserve_devices && IS_DEVICE(mode))
912          || (preserve_specials && IS_SPECIAL(mode))) {
913                 uint32 *devp = F_RDEV_P(file);
914                 DEV_MAJOR(devp) = major(rdev);
915                 DEV_MINOR(devp) = minor(rdev);
916         }
917
918 #ifdef SUPPORT_LINKS
919         if (linkname_len) {
920                 bp = (char*)file->basename + basename_len;
921                 if (first_hlink_ndx >= flist->ndx_start) {
922                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
923                         memcpy(bp, F_SYMLINK(first), linkname_len);
924                 } else if (munge_symlinks) {
925                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
926                         bp += SYMLINK_PREFIX_LEN;
927                         linkname_len -= SYMLINK_PREFIX_LEN;
928                         read_sbuf(f, bp, linkname_len - 1);
929                 } else {
930                         read_sbuf(f, bp, linkname_len - 1);
931                         if (sanitize_paths)
932                                 sanitize_path(bp, bp, "", lastdir_depth);
933                 }
934         }
935 #endif
936
937 #ifdef SUPPORT_HARD_LINKS
938         if (preserve_hard_links && xflags & XMIT_HLINKED) {
939                 if (protocol_version >= 30) {
940                         if (xflags & XMIT_HLINK_FIRST) {
941                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
942                         } else
943                                 F_HL_GNUM(file) = first_hlink_ndx;
944                 } else {
945                         static int32 cnt = 0;
946                         struct ht_int64_node *np;
947                         int64 ino;
948                         int32 ndx;
949                         if (protocol_version < 26) {
950                                 dev = read_int(f);
951                                 ino = read_int(f);
952                         } else {
953                                 if (!(xflags & XMIT_SAME_DEV_pre30))
954                                         dev = read_longint(f);
955                                 ino = read_longint(f);
956                         }
957                         np = idev_find(dev, ino);
958                         ndx = (int32)(long)np->data - 1;
959                         if (ndx < 0) {
960                                 ndx = cnt++;
961                                 np->data = (void*)(long)cnt;
962                         }
963                         F_HL_GNUM(file) = ndx;
964                 }
965         }
966 #endif
967
968         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
969                 if (S_ISREG(mode))
970                         bp = F_SUM(file);
971                 else {
972                         /* Prior to 28, we get a useless set of nulls. */
973                         bp = tmp_sum;
974                 }
975                 if (first_hlink_ndx >= flist->ndx_start) {
976                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
977                         memcpy(bp, F_SUM(first), checksum_len);
978                 } else
979                         read_buf(f, bp, checksum_len);
980         }
981
982 #ifdef SUPPORT_ACLS
983         if (preserve_acls && !S_ISLNK(mode))
984                 receive_acl(file, f);
985 #endif
986 #ifdef SUPPORT_XATTRS
987         if (preserve_xattrs)
988                 receive_xattr(file, f );
989 #endif
990
991         if (S_ISREG(mode) || S_ISLNK(mode))
992                 stats.total_size += file_length;
993
994         return file;
995 }
996
997 /* Create a file_struct for a named file by reading its stat() information
998  * and performing extensive checks against global options.
999  *
1000  * Returns a pointer to the new file struct, or NULL if there was an error
1001  * or this file should be excluded. */
1002 struct file_struct *make_file(const char *fname, struct file_list *flist,
1003                               STRUCT_STAT *stp, int flags, int filter_level)
1004 {
1005         static char *lastdir;
1006         static int lastdir_len = -1;
1007         struct file_struct *file;
1008         char thisname[MAXPATHLEN];
1009         char linkname[MAXPATHLEN];
1010         int alloc_len, basename_len, linkname_len;
1011         int extra_len = file_extra_cnt * EXTRA_LEN;
1012         const char *basename;
1013         alloc_pool_t *pool;
1014         STRUCT_STAT st;
1015         char *bp;
1016
1017         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1018                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1019                 return NULL;
1020         }
1021         clean_fname(thisname, 0);
1022         if (sanitize_paths)
1023                 sanitize_path(thisname, thisname, "", 0);
1024
1025         if (stp && S_ISDIR(stp->st_mode)) {
1026                 st = *stp; /* Needed for "symlink/." with --relative. */
1027                 *linkname = '\0'; /* make IBM code checker happy */
1028         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1029                 int save_errno = errno;
1030                 /* See if file is excluded before reporting an error. */
1031                 if (filter_level != NO_FILTERS
1032                  && (is_excluded(thisname, 0, filter_level)
1033                   || is_excluded(thisname, 1, filter_level))) {
1034                         if (ignore_perishable && save_errno != ENOENT)
1035                                 non_perishable_cnt++;
1036                         return NULL;
1037                 }
1038                 if (save_errno == ENOENT) {
1039 #ifdef SUPPORT_LINKS
1040                         /* When our options tell us to follow a symlink that
1041                          * points nowhere, tell the user about the symlink
1042                          * instead of giving a "vanished" message.  We only
1043                          * dereference a symlink if one of the --copy*links
1044                          * options was specified, so there's no need for the
1045                          * extra lstat() if one of these options isn't on. */
1046                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1047                          && x_lstat(thisname, &st, NULL) == 0
1048                          && S_ISLNK(st.st_mode)) {
1049                                 io_error |= IOERR_GENERAL;
1050                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1051                                         full_fname(thisname));
1052                         } else
1053 #endif
1054                         {
1055                                 enum logcode c = am_daemon && protocol_version < 28
1056                                                ? FERROR : FWARNING;
1057                                 io_error |= IOERR_VANISHED;
1058                                 rprintf(c, "file has vanished: %s\n",
1059                                         full_fname(thisname));
1060                         }
1061                 } else {
1062                         io_error |= IOERR_GENERAL;
1063                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1064                                 full_fname(thisname));
1065                 }
1066                 return NULL;
1067         }
1068
1069         /* backup.c calls us with filter_level set to NO_FILTERS. */
1070         if (filter_level == NO_FILTERS)
1071                 goto skip_filters;
1072
1073         if (S_ISDIR(st.st_mode)) {
1074                 if (!xfer_dirs) {
1075                         rprintf(FINFO, "skipping directory %s\n", thisname);
1076                         return NULL;
1077                 }
1078                 /* -x only affects dirs because we need to avoid recursing
1079                  * into a mount-point directory, not to avoid copying a
1080                  * symlinked file if -L (or similar) was specified. */
1081                 if (one_file_system && st.st_dev != filesystem_dev
1082                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1083                         if (one_file_system > 1) {
1084                                 if (verbose > 1) {
1085                                         rprintf(FINFO,
1086                                             "[%s] skipping mount-point dir %s\n",
1087                                             who_am_i(), thisname);
1088                                 }
1089                                 return NULL;
1090                         }
1091                         flags |= FLAG_MOUNT_DIR;
1092                         flags &= ~FLAG_CONTENT_DIR;
1093                 }
1094         } else
1095                 flags &= ~FLAG_CONTENT_DIR;
1096
1097         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1098                 if (ignore_perishable)
1099                         non_perishable_cnt++;
1100                 return NULL;
1101         }
1102
1103         if (lp_ignore_nonreadable(module_id)) {
1104 #ifdef SUPPORT_LINKS
1105                 if (!S_ISLNK(st.st_mode))
1106 #endif
1107                         if (access(thisname, R_OK) != 0)
1108                                 return NULL;
1109         }
1110
1111   skip_filters:
1112
1113         /* Only divert a directory in the main transfer. */
1114         if (flist) {
1115                 if (flist->prev && S_ISDIR(st.st_mode)
1116                  && flags & FLAG_DIVERT_DIRS) {
1117                         /* Room for parent/sibling/next-child info. */
1118                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1119                         if (relative_paths)
1120                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1121                         pool = dir_flist->file_pool;
1122                 } else
1123                         pool = flist->file_pool;
1124         } else
1125                 pool = NULL;
1126
1127         if (verbose > 2) {
1128                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1129                         who_am_i(), thisname, filter_level);
1130         }
1131
1132         if ((basename = strrchr(thisname, '/')) != NULL) {
1133                 int len = basename++ - thisname;
1134                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1135                         lastdir = new_array(char, len + 1);
1136                         memcpy(lastdir, thisname, len);
1137                         lastdir[len] = '\0';
1138                         lastdir_len = len;
1139                 }
1140         } else
1141                 basename = thisname;
1142         basename_len = strlen(basename) + 1; /* count the '\0' */
1143
1144 #ifdef SUPPORT_LINKS
1145         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1146 #else
1147         linkname_len = 0;
1148 #endif
1149
1150         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1151                 extra_len += EXTRA_LEN;
1152
1153 #if EXTRA_ROUNDING > 0
1154         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1155                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1156 #endif
1157
1158         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1159                   + linkname_len;
1160         if (pool)
1161                 bp = pool_alloc(pool, alloc_len, "make_file");
1162         else {
1163                 if (!(bp = new_array(char, alloc_len)))
1164                         out_of_memory("make_file");
1165         }
1166
1167         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1168         bp += extra_len;
1169         file = (struct file_struct *)bp;
1170         bp += FILE_STRUCT_LEN;
1171
1172         memcpy(bp, basename, basename_len);
1173         bp += basename_len + linkname_len; /* skip space for symlink too */
1174
1175 #ifdef SUPPORT_HARD_LINKS
1176         if (preserve_hard_links && flist && flist->prev) {
1177                 if (protocol_version >= 28
1178                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1179                  : S_ISREG(st.st_mode)) {
1180                         tmp_dev = st.st_dev;
1181                         tmp_ino = st.st_ino;
1182                 } else
1183                         tmp_dev = 0;
1184         }
1185 #endif
1186
1187 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1188         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1189                 tmp_rdev = st.st_rdev;
1190                 st.st_size = 0;
1191         }
1192 #endif
1193
1194         file->flags = flags;
1195         file->modtime = st.st_mtime;
1196         file->len32 = (uint32)st.st_size;
1197         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1198                 file->flags |= FLAG_LENGTH64;
1199                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1200         }
1201         file->mode = st.st_mode;
1202         if (uid_ndx)
1203                 F_OWNER(file) = st.st_uid;
1204         if (gid_ndx)
1205                 F_GROUP(file) = st.st_gid;
1206
1207         if (basename != thisname)
1208                 file->dirname = lastdir;
1209
1210 #ifdef SUPPORT_LINKS
1211         if (linkname_len) {
1212                 bp = (char*)file->basename + basename_len;
1213                 memcpy(bp, linkname, linkname_len);
1214         }
1215 #endif
1216
1217         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1218                 file_checksum(thisname, tmp_sum, st.st_size);
1219
1220         F_PATHNAME(file) = pathname;
1221
1222         /* This code is only used by the receiver when it is building
1223          * a list of files for a delete pass. */
1224         if (keep_dirlinks && linkname_len && flist) {
1225                 STRUCT_STAT st2;
1226                 int save_mode = file->mode;
1227                 file->mode = S_IFDIR; /* Find a directory with our name. */
1228                 if (flist_find(dir_flist, file) >= 0
1229                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1230                         file->modtime = st2.st_mtime;
1231                         file->len32 = 0;
1232                         file->mode = st2.st_mode;
1233                         if (uid_ndx)
1234                                 F_OWNER(file) = st2.st_uid;
1235                         if (gid_ndx)
1236                                 F_GROUP(file) = st2.st_gid;
1237                 } else
1238                         file->mode = save_mode;
1239         }
1240
1241         if (basename_len == 0+1) {
1242                 if (!pool)
1243                         unmake_file(file);
1244                 return NULL;
1245         }
1246
1247         if (unsort_ndx)
1248                 F_NDX(file) = dir_count;
1249
1250         return file;
1251 }
1252
1253 /* Only called for temporary file_struct entries created by make_file(). */
1254 void unmake_file(struct file_struct *file)
1255 {
1256         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1257 #if EXTRA_ROUNDING > 0
1258         if (extra_cnt & EXTRA_ROUNDING)
1259                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1260 #endif
1261         free(REQ_EXTRA(file, extra_cnt));
1262 }
1263
1264 static struct file_struct *send_file_name(int f, struct file_list *flist,
1265                                           char *fname, STRUCT_STAT *stp,
1266                                           int flags, int filter_level)
1267 {
1268         struct file_struct *file;
1269 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1270         stat_x sx;
1271 #endif
1272
1273         file = make_file(fname, flist, stp, flags, filter_level);
1274         if (!file)
1275                 return NULL;
1276
1277         if (chmod_modes && !S_ISLNK(file->mode))
1278                 file->mode = tweak_mode(file->mode, chmod_modes);
1279
1280 #ifdef SUPPORT_ACLS
1281         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1282                 sx.st.st_mode = file->mode;
1283                 sx.acc_acl = sx.def_acl = NULL;
1284                 if (get_acl(fname, &sx) < 0)
1285                         return NULL;
1286         }
1287 #endif
1288 #ifdef SUPPORT_XATTRS
1289         if (preserve_xattrs && f >= 0) {
1290                 sx.xattr = NULL;
1291                 if (get_xattr(fname, &sx) < 0)
1292                         return NULL;
1293         }
1294 #endif
1295
1296         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1297
1298         flist_expand(flist, 1);
1299         flist->files[flist->used++] = file;
1300         if (f >= 0) {
1301                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1302 #ifdef SUPPORT_ACLS
1303                 if (preserve_acls && !S_ISLNK(file->mode)) {
1304                         send_acl(&sx, f);
1305                         free_acl(&sx);
1306                 }
1307 #endif
1308 #ifdef SUPPORT_XATTRS
1309                 if (preserve_xattrs) {
1310                         F_XATTR(file) = send_xattr(&sx, f);
1311                         free_xattr(&sx);
1312                 }
1313 #endif
1314         }
1315         return file;
1316 }
1317
1318 static void send_if_directory(int f, struct file_list *flist,
1319                               struct file_struct *file,
1320                               char *fbuf, unsigned int ol,
1321                               int flags)
1322 {
1323         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1324
1325         if (S_ISDIR(file->mode)
1326             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1327                 void *save_filters;
1328                 unsigned int len = strlen(fbuf);
1329                 if (len > 1 && fbuf[len-1] == '/')
1330                         fbuf[--len] = '\0';
1331                 if (len >= MAXPATHLEN - 1) {
1332                         io_error |= IOERR_GENERAL;
1333                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1334                                 full_fname(fbuf));
1335                         return;
1336                 }
1337                 save_filters = push_local_filters(fbuf, len);
1338                 send_directory(f, flist, fbuf, len, flags);
1339                 pop_local_filters(save_filters);
1340                 fbuf[ol] = '\0';
1341                 if (is_dot_dir)
1342                         fbuf[ol-1] = '.';
1343         }
1344 }
1345
1346 static int file_compare(const void *file1, const void *file2)
1347 {
1348         return f_name_cmp(*(struct file_struct **)file1,
1349                           *(struct file_struct **)file2);
1350 }
1351
1352 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1353  * version, but I (Wayne) changed the merge code to do less copying and
1354  * to require only half the amount of temporary memory. */
1355 static void fsort_tmp(struct file_struct **fp, size_t num,
1356                       struct file_struct **tmp)
1357 {
1358         struct file_struct **f1, **f2, **t;
1359         size_t n1, n2;
1360
1361         n1 = num / 2;
1362         n2 = num - n1;
1363         f1 = fp;
1364         f2 = fp + n1;
1365
1366         if (n1 > 1)
1367                 fsort_tmp(f1, n1, tmp);
1368         if (n2 > 1)
1369                 fsort_tmp(f2, n2, tmp);
1370
1371         while (f_name_cmp(*f1, *f2) <= 0) {
1372                 if (!--n1)
1373                         return;
1374                 f1++;
1375         }
1376
1377         t = tmp;
1378         memcpy(t, f1, n1 * PTR_SIZE);
1379
1380         *f1++ = *f2++, n2--;
1381
1382         while (n1 > 0 && n2 > 0) {
1383                 if (f_name_cmp(*t, *f2) <= 0)
1384                         *f1++ = *t++, n1--;
1385                 else
1386                         *f1++ = *f2++, n2--;
1387         }
1388
1389         if (n1 > 0)
1390                 memcpy(f1, t, n1 * PTR_SIZE);
1391 }
1392
1393 /* This file-struct sorting routine makes sure that any identical names in
1394  * the file list stay in the same order as they were in the original list.
1395  * This is particularly vital in inc_recurse mode where we expect a sort
1396  * on the flist to match the exact order of a sort on the dir_flist. */
1397 static void fsort(struct file_struct **fp, size_t num)
1398 {
1399         if (num <= 1)
1400                 return;
1401
1402         if (use_qsort)
1403                 qsort(fp, num, PTR_SIZE, file_compare);
1404         else {
1405                 struct file_struct **tmp = new_array(struct file_struct *,
1406                                                      (num+1) / 2);
1407                 fsort_tmp(fp, num, tmp);
1408                 free(tmp);
1409         }
1410 }
1411
1412 /* We take an entire set of sibling dirs from the sorted flist and link them
1413  * into the tree, setting the appropriate parent/child/sibling pointers. */
1414 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1415                              int dir_cnt)
1416 {
1417         int i;
1418         int32 *dp = NULL;
1419         int32 *parent_dp = parent_ndx < 0 ? NULL
1420                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1421
1422         flist_expand(dir_flist, dir_cnt);
1423         dir_flist->sorted = dir_flist->files;
1424
1425         for (i = 0; dir_cnt; i++) {
1426                 struct file_struct *file = from_flist->sorted[i];
1427
1428                 if (!S_ISDIR(file->mode))
1429                         continue;
1430
1431                 dir_flist->files[dir_flist->used++] = file;
1432                 dir_cnt--;
1433
1434                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1435                         continue;
1436
1437                 if (dp)
1438                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1439                 else if (parent_dp)
1440                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1441                 else
1442                         send_dir_ndx = dir_flist->used - 1;
1443
1444                 dp = F_DIR_NODE_P(file);
1445                 DIR_PARENT(dp) = parent_ndx;
1446                 DIR_FIRST_CHILD(dp) = -1;
1447         }
1448         if (dp)
1449                 DIR_NEXT_SIBLING(dp) = -1;
1450 }
1451
1452 /* This function is normally called by the sender, but the receiving side also
1453  * calls it from get_dirlist() with f set to -1 so that we just construct the
1454  * file list in memory without sending it over the wire.  Also, get_dirlist()
1455  * might call this with f set to -2, which also indicates that local filter
1456  * rules should be ignored. */
1457 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1458                            int flags)
1459 {
1460         struct dirent *di;
1461         unsigned remainder;
1462         char *p;
1463         DIR *d;
1464         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1465         int start = flist->used;
1466         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1467
1468         assert(flist != NULL);
1469
1470         if (!(d = opendir(fbuf))) {
1471                 io_error |= IOERR_GENERAL;
1472                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1473                 return;
1474         }
1475
1476         p = fbuf + len;
1477         if (len != 1 || *fbuf != '/')
1478                 *p++ = '/';
1479         *p = '\0';
1480         remainder = MAXPATHLEN - (p - fbuf);
1481
1482         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1483                 char *dname = d_name(di);
1484                 if (dname[0] == '.' && (dname[1] == '\0'
1485                     || (dname[1] == '.' && dname[2] == '\0')))
1486                         continue;
1487                 if (strlcpy(p, dname, remainder) >= remainder) {
1488                         io_error |= IOERR_GENERAL;
1489                         rprintf(FINFO,
1490                                 "cannot send long-named file %s\n",
1491                                 full_fname(fbuf));
1492                         continue;
1493                 }
1494                 if (dname[0] == '\0') {
1495                         io_error |= IOERR_GENERAL;
1496                         rprintf(FINFO,
1497                                 "cannot send file with empty name in %s\n",
1498                                 full_fname(fbuf));
1499                         continue;
1500                 }
1501
1502                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1503         }
1504
1505         fbuf[len] = '\0';
1506
1507         if (errno) {
1508                 io_error |= IOERR_GENERAL;
1509                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1510         }
1511
1512         closedir(d);
1513
1514         if (f >= 0 && recurse && !divert_dirs) {
1515                 int i, end = flist->used - 1;
1516                 /* send_if_directory() bumps flist->used, so use "end". */
1517                 for (i = start; i <= end; i++)
1518                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1519         }
1520 }
1521
1522 static char lastpath[MAXPATHLEN] = "";
1523 static int lastpath_len = 0;
1524 static struct file_struct *lastpath_struct;
1525
1526 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1527                               char *start, char *limit, int flags, char name_type)
1528 {
1529         struct file_struct *file;
1530         item_list *relname_list;
1531         relnamecache **rnpp;
1532         char *slash;
1533         int len, need_new_dir;
1534         struct filter_list_struct save_filter_list = filter_list;
1535
1536         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1537         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1538
1539         if (inc_recurse) {
1540                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1541                  && lastpath_len == limit - fname
1542                  && strncmp(lastpath, fname, lastpath_len) == 0)
1543                         need_new_dir = 0;
1544                 else
1545                         need_new_dir = 1;
1546         } else
1547                 need_new_dir = 1;
1548
1549         if (need_new_dir) {
1550                 int save_copy_links = copy_links;
1551                 int save_xfer_dirs = xfer_dirs;
1552
1553                 copy_links = xfer_dirs = 1;
1554
1555                 *limit = '\0';
1556
1557                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1558                         *slash = '\0';
1559                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1560                         *slash = '/';
1561                 }
1562
1563                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1564                 if (inc_recurse) {
1565                         if (file && !S_ISDIR(file->mode))
1566                                 file = NULL;
1567                         lastpath_struct = file;
1568                 }
1569
1570                 strlcpy(lastpath, fname, sizeof lastpath);
1571                 lastpath_len = limit - fname;
1572
1573                 *limit = '/';
1574
1575                 copy_links = save_copy_links;
1576                 xfer_dirs = save_xfer_dirs;
1577
1578                 if (!inc_recurse)
1579                         goto done;
1580         }
1581
1582         if (!lastpath_struct)
1583                 goto done; /* dir must have vanished */
1584
1585         len = strlen(limit+1);
1586         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1587         if (!relname_list) {
1588                 if (!(relname_list = new0(item_list)))
1589                         out_of_memory("send_implied_dirs");
1590                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1591         }
1592         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1593         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1594                 out_of_memory("send_implied_dirs");
1595         (*rnpp)->name_type = name_type;
1596         strlcpy((*rnpp)->fname, limit+1, len + 1);
1597
1598 done:
1599         filter_list = save_filter_list;
1600 }
1601
1602 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1603 {
1604         char fbuf[MAXPATHLEN];
1605         item_list *relname_list;
1606         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1607         size_t j;
1608
1609         f_name(file, fbuf);
1610         dlen = strlen(fbuf);
1611
1612         if (F_PATHNAME(file) != pathname) {
1613                 if (!push_pathname(F_PATHNAME(file), -1))
1614                         exit_cleanup(RERR_FILESELECT);
1615         }
1616
1617         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1618
1619         if (file->flags & FLAG_CONTENT_DIR) {
1620                 if (one_file_system) {
1621                         STRUCT_STAT st;
1622                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1623                                 io_error |= IOERR_GENERAL;
1624                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1625                                         full_fname(fbuf));
1626                                 return;
1627                         }
1628                         filesystem_dev = st.st_dev;
1629                 }
1630                 send_directory(f, flist, fbuf, dlen, flags);
1631         }
1632
1633         if (!relative_paths)
1634                 return;
1635
1636         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1637         if (!relname_list)
1638                 return;
1639
1640         for (j = 0; j < relname_list->count; j++) {
1641                 char *slash;
1642                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1643                 char name_type = rnp->name_type;
1644
1645                 fbuf[dlen] = '/';
1646                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1647                 free(rnp);
1648                 if (len >= (int)sizeof fbuf)
1649                         continue; /* Impossible... */
1650
1651                 slash = strchr(fbuf+dlen+1, '/');
1652                 if (slash) {
1653                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1654                         continue;
1655                 }
1656
1657                 if (name_type != NORMAL_NAME) {
1658                         STRUCT_STAT st;
1659                         if (link_stat(fbuf, &st, 1) != 0) {
1660                                 io_error |= IOERR_GENERAL;
1661                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1662                                         full_fname(fbuf));
1663                                 continue;
1664                         }
1665                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1666                 } else
1667                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1668         }
1669
1670         free(relname_list);
1671 }
1672
1673 void send_extra_file_list(int f, int at_least)
1674 {
1675         struct file_list *flist;
1676         int64 start_write;
1677         uint16 prev_flags;
1678         int old_cnt, save_io_error = io_error;
1679
1680         if (flist_eof)
1681                 return;
1682
1683         /* Keep sending data until we have the requested number of
1684          * files in the upcoming file-lists. */
1685         old_cnt = cur_flist->used;
1686         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1687                 old_cnt += flist->used;
1688         while (file_total - old_cnt < at_least) {
1689                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1690                 int dir_ndx, dstart = dir_count;
1691                 const char *pathname = F_PATHNAME(file);
1692                 int32 *dp;
1693
1694                 flist = flist_new(0, "send_extra_file_list");
1695                 start_write = stats.total_written;
1696
1697                 if (unsort_ndx)
1698                         dir_ndx = F_NDX(file);
1699                 else
1700                         dir_ndx = send_dir_ndx;
1701                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1702                 flist->parent_ndx = dir_ndx;
1703
1704                 send1extra(f, file, flist);
1705                 prev_flags = file->flags;
1706                 dp = F_DIR_NODE_P(file);
1707
1708                 /* If there are any duplicate directory names that follow, we
1709                  * send all the dirs together in one file-list.  The dir_flist
1710                  * tree links all the child subdirs onto the last dup dir. */
1711                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1712                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1713                         send_dir_ndx = dir_ndx;
1714                         file = dir_flist->sorted[dir_ndx];
1715                         /* Try to avoid some duplicate scanning of identical dirs. */
1716                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1717                                 file->flags &= ~FLAG_CONTENT_DIR;
1718                         send1extra(f, file, flist);
1719                         prev_flags = file->flags;
1720                         dp = F_DIR_NODE_P(file);
1721                 }
1722
1723                 write_byte(f, 0);
1724
1725                 if (need_unsorted_flist) {
1726                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1727                                 out_of_memory("send_extra_file_list");
1728                         memcpy(flist->sorted, flist->files,
1729                                flist->used * sizeof (struct file_struct*));
1730                 } else
1731                         flist->sorted = flist->files;
1732
1733                 flist_sort_and_clean(flist, 0);
1734
1735                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1736                 flist_done_allocating(flist);
1737
1738                 file_total += flist->used;
1739                 stats.flist_size += stats.total_written - start_write;
1740                 stats.num_files += flist->used;
1741                 if (verbose > 3)
1742                         output_flist(flist);
1743
1744                 if (DIR_FIRST_CHILD(dp) >= 0) {
1745                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1746                         send_dir_depth++;
1747                 } else {
1748                         while (DIR_NEXT_SIBLING(dp) < 0) {
1749                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1750                                         write_ndx(f, NDX_FLIST_EOF);
1751                                         flist_eof = 1;
1752                                         change_local_filter_dir(NULL, 0, 0);
1753                                         goto finish;
1754                                 }
1755                                 send_dir_depth--;
1756                                 file = dir_flist->sorted[send_dir_ndx];
1757                                 dp = F_DIR_NODE_P(file);
1758                         }
1759                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1760                 }
1761         }
1762
1763   finish:
1764         if (io_error != save_io_error && !ignore_errors)
1765                 send_msg_int(MSG_IO_ERROR, io_error);
1766 }
1767
1768 struct file_list *send_file_list(int f, int argc, char *argv[])
1769 {
1770         static const char *lastdir;
1771         static int lastdir_len = -1;
1772         int len, dirlen;
1773         STRUCT_STAT st;
1774         char *p, *dir;
1775         struct file_list *flist;
1776         struct timeval start_tv, end_tv;
1777         int64 start_write;
1778         int use_ff_fd = 0;
1779         int disable_buffering;
1780         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1781         int reading_remotely = filesfrom_host != NULL;
1782         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1783 #ifdef ICONV_OPTION
1784                      | (filesfrom_convert ? RL_CONVERT : 0)
1785 #endif
1786                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1787
1788         rprintf(FLOG, "building file list\n");
1789         if (show_filelist_p())
1790                 start_filelist_progress("building file list");
1791         else if (inc_recurse && verbose && !am_server)
1792                 rprintf(FCLIENT, "sending incremental file list\n");
1793
1794         start_write = stats.total_written;
1795         gettimeofday(&start_tv, NULL);
1796
1797         if (relative_paths && protocol_version >= 30)
1798                 implied_dirs = 1; /* We send flagged implied dirs */
1799
1800 #ifdef SUPPORT_HARD_LINKS
1801         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1802                 init_hard_links();
1803 #endif
1804
1805         flist = cur_flist = flist_new(0, "send_file_list");
1806         if (inc_recurse) {
1807                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1808                 flags |= FLAG_DIVERT_DIRS;
1809         } else
1810                 dir_flist = cur_flist;
1811
1812         disable_buffering = io_start_buffering_out(f);
1813         if (filesfrom_fd >= 0) {
1814                 if (argv[0] && !push_dir(argv[0], 0)) {
1815                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1816                                 full_fname(argv[0]), curr_dir);
1817                         exit_cleanup(RERR_FILESELECT);
1818                 }
1819                 use_ff_fd = 1;
1820         }
1821
1822         while (1) {
1823                 char fbuf[MAXPATHLEN], *fn, name_type;
1824
1825                 if (use_ff_fd) {
1826                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1827                                 break;
1828                         sanitize_path(fbuf, fbuf, "", 0);
1829                 } else {
1830                         if (argc-- == 0)
1831                                 break;
1832                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1833                         if (sanitize_paths)
1834                                 sanitize_path(fbuf, fbuf, "", 0);
1835                 }
1836
1837                 len = strlen(fbuf);
1838                 if (relative_paths) {
1839                         /* We clean up fbuf below. */
1840                         name_type = NORMAL_NAME;
1841                 } else if (!len || fbuf[len - 1] == '/') {
1842                         if (len == 2 && fbuf[0] == '.') {
1843                                 /* Turn "./" into just "." rather than "./." */
1844                                 fbuf[--len] = '\0';
1845                         } else {
1846                                 if (len + 1 >= MAXPATHLEN)
1847                                         overflow_exit("send_file_list");
1848                                 fbuf[len++] = '.';
1849                                 fbuf[len] = '\0';
1850                         }
1851                         name_type = DOT_NAME;
1852                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1853                     && (len == 2 || fbuf[len-3] == '/')) {
1854                         if (len + 2 >= MAXPATHLEN)
1855                                 overflow_exit("send_file_list");
1856                         fbuf[len++] = '/';
1857                         fbuf[len++] = '.';
1858                         fbuf[len] = '\0';
1859                         name_type = DOT_NAME;
1860                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1861                         name_type = DOT_NAME;
1862                 else
1863                         name_type = NORMAL_NAME;
1864
1865                 dir = NULL;
1866
1867                 if (!relative_paths) {
1868                         p = strrchr(fbuf, '/');
1869                         if (p) {
1870                                 *p = '\0';
1871                                 if (p == fbuf)
1872                                         dir = "/";
1873                                 else
1874                                         dir = fbuf;
1875                                 len -= p - fbuf + 1;
1876                                 fn = p + 1;
1877                         } else
1878                                 fn = fbuf;
1879                 } else {
1880                         if ((p = strstr(fbuf, "/./")) != NULL) {
1881                                 *p = '\0';
1882                                 if (p == fbuf)
1883                                         dir = "/";
1884                                 else
1885                                         dir = fbuf;
1886                                 fn = p + 3;
1887                                 while (*fn == '/')
1888                                         fn++;
1889                                 if (!*fn)
1890                                         *--fn = '\0'; /* ensure room for '.' */
1891                         } else
1892                                 fn = fbuf;
1893                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1894                                             | CFN_KEEP_TRAILING_SLASH
1895                                             | CFN_DROP_TRAILING_DOT_DIR);
1896                         if (len == 1) {
1897                                 if (fn[0] == '/') {
1898                                         fn = "/.";
1899                                         len = 2;
1900                                         name_type = DOT_NAME;
1901                                 } else if (fn[0] == '.')
1902                                         name_type = DOT_NAME;
1903                         } else if (fn[len-1] == '/') {
1904                                 fn[--len] = '\0';
1905                                 if (len == 1 && *fn == '.')
1906                                         name_type = DOT_NAME;
1907                                 else
1908                                         name_type = SLASH_ENDING_NAME;
1909                         }
1910                         /* Reject a ".." dir in the active part of the path. */
1911                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1912                                 if ((p[2] == '/' || p[2] == '\0')
1913                                  && (p == fn || p[-1] == '/')) {
1914                                         rprintf(FERROR,
1915                                             "found \"..\" dir in relative path: %s\n",
1916                                             fn);
1917                                         exit_cleanup(RERR_SYNTAX);
1918                                 }
1919                         }
1920                 }
1921
1922                 if (!*fn) {
1923                         len = 1;
1924                         fn = ".";
1925                         name_type = DOT_NAME;
1926                 }
1927
1928                 dirlen = dir ? strlen(dir) : 0;
1929                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1930                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1931                                 continue;
1932                         lastdir = pathname;
1933                         lastdir_len = pathname_len;
1934                 } else if (!push_pathname(lastdir, lastdir_len))
1935                         continue;
1936
1937                 if (fn != fbuf)
1938                         memmove(fbuf, fn, len + 1);
1939
1940                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1941                         io_error |= IOERR_GENERAL;
1942                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1943                                 full_fname(fbuf));
1944                         continue;
1945                 }
1946
1947                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1948                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1949                         continue;
1950                 }
1951
1952                 if (inc_recurse && relative_paths && *fbuf) {
1953                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1954                                 if (p - fbuf == 1 && *fbuf == '.') {
1955                                         if ((fn = strchr(p+1, '/')) != NULL)
1956                                                 p = fn;
1957                                 } else
1958                                         fn = p;
1959                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1960                                 if (fn == p)
1961                                         continue;
1962                         }
1963                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1964                         /* Send the implied directories at the start of the
1965                          * source spec, so we get their permissions right. */
1966                         char *lp = lastpath, *slash = fbuf;
1967                         *p = '\0';
1968                         /* Skip any initial directories in our path that we
1969                          * have in common with lastpath. */
1970                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1971                                 if (*fn == '/')
1972                                         slash = fn;
1973                         }
1974                         *p = '/';
1975                         if (fn != p || (*lp && *lp != '/'))
1976                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1977                 }
1978
1979                 if (one_file_system)
1980                         filesystem_dev = st.st_dev;
1981
1982                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1983                         struct file_struct *file;
1984                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1985                         file = send_file_name(f, flist, fbuf, &st,
1986                                               top_flags, ALL_FILTERS);
1987                         if (inc_recurse) {
1988                                 if (name_type == DOT_NAME && file) {
1989                                         if (send_dir_depth < 0) {
1990                                                 send_dir_depth = 0;
1991                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1992                                         }
1993                                         send_directory(f, flist, fbuf, len, flags);
1994                                 }
1995                         } else if (file)
1996                                 send_if_directory(f, flist, file, fbuf, len, flags);
1997                 } else
1998                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1999         }
2000
2001         gettimeofday(&end_tv, NULL);
2002         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2003                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2004         if (stats.flist_buildtime == 0)
2005                 stats.flist_buildtime = 1;
2006         start_tv = end_tv;
2007
2008         write_byte(f, 0); /* Indicate end of file list */
2009
2010 #ifdef SUPPORT_HARD_LINKS
2011         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2012                 idev_destroy();
2013 #endif
2014
2015         if (show_filelist_p())
2016                 finish_filelist_progress(flist);
2017
2018         gettimeofday(&end_tv, NULL);
2019         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2020                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2021
2022         /* When converting names, both sides keep an unsorted file-list array
2023          * because the names will differ on the sending and receiving sides
2024          * (both sides will use the unsorted index number for each item). */
2025
2026         /* Sort the list without removing any duplicates.  This allows the
2027          * receiving side to ask for whatever name it kept.  For incremental
2028          * recursion mode, the sender marks duplicate dirs so that it can
2029          * send them together in a single file-list. */
2030         if (need_unsorted_flist) {
2031                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2032                         out_of_memory("send_file_list");
2033                 memcpy(flist->sorted, flist->files,
2034                        flist->used * sizeof (struct file_struct*));
2035         } else
2036                 flist->sorted = flist->files;
2037         flist_sort_and_clean(flist, 0);
2038         file_total += flist->used;
2039
2040         if (!numeric_ids && !inc_recurse)
2041                 send_id_list(f);
2042
2043         /* send the io_error flag */
2044         if (protocol_version < 30)
2045                 write_int(f, ignore_errors ? 0 : io_error);
2046         else if (io_error && !ignore_errors)
2047                 send_msg_int(MSG_IO_ERROR, io_error);
2048
2049         if (disable_buffering)
2050                 io_end_buffering_out();
2051
2052         stats.flist_size = stats.total_written - start_write;
2053         stats.num_files = flist->used;
2054
2055         if (verbose > 3)
2056                 output_flist(flist);
2057
2058         if (verbose > 2)
2059                 rprintf(FINFO, "send_file_list done\n");
2060
2061         if (inc_recurse) {
2062                 send_dir_depth = 1;
2063                 add_dirs_to_tree(-1, flist, dir_count);
2064                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0) 
2065                         flist->parent_ndx = -1;
2066                 flist_done_allocating(flist);
2067                 if (send_dir_ndx < 0) {
2068                         write_ndx(f, NDX_FLIST_EOF);
2069                         flist_eof = 1;
2070                 }
2071                 else if (file_total == 1) {
2072                         /* If we're creating incremental file-lists and there
2073                          * was just 1 item in the first file-list, send 1 more
2074                          * file-list to check if this is a 1-file xfer. */
2075                         send_extra_file_list(f, 1);
2076                 }
2077         }
2078
2079         return flist;
2080 }
2081
2082 struct file_list *recv_file_list(int f)
2083 {
2084         struct file_list *flist;
2085         int dstart, flags;
2086         int64 start_read;
2087
2088         if (!first_flist)
2089                 rprintf(FLOG, "receiving file list\n");
2090         if (show_filelist_p())
2091                 start_filelist_progress("receiving file list");
2092         else if (inc_recurse && verbose && !am_server && !first_flist)
2093                 rprintf(FCLIENT, "receiving incremental file list\n");
2094
2095         start_read = stats.total_read;
2096
2097 #ifdef SUPPORT_HARD_LINKS
2098         if (preserve_hard_links && !first_flist)
2099                 init_hard_links();
2100 #endif
2101
2102         flist = flist_new(0, "recv_file_list");
2103
2104         if (inc_recurse) {
2105                 if (flist->ndx_start == 1)
2106                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2107                 dstart = dir_flist->used;
2108         } else {
2109                 dir_flist = flist;
2110                 dstart = 0;
2111         }
2112
2113         while ((flags = read_byte(f)) != 0) {
2114                 struct file_struct *file;
2115
2116                 flist_expand(flist, 1);
2117
2118                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2119                         flags |= read_byte(f) << 8;
2120                 file = recv_file_entry(flist, flags, f);
2121
2122                 if (inc_recurse && S_ISDIR(file->mode)) {
2123                         flist_expand(dir_flist, 1);
2124                         dir_flist->files[dir_flist->used++] = file;
2125                 }
2126
2127                 flist->files[flist->used++] = file;
2128
2129                 maybe_emit_filelist_progress(flist->used);
2130
2131                 if (verbose > 2) {
2132                         rprintf(FINFO, "recv_file_name(%s)\n",
2133                                 f_name(file, NULL));
2134                 }
2135         }
2136         file_total += flist->used;
2137
2138         if (verbose > 2)
2139                 rprintf(FINFO, "received %d names\n", flist->used);
2140
2141         if (show_filelist_p())
2142                 finish_filelist_progress(flist);
2143
2144         if (need_unsorted_flist) {
2145                 /* Create an extra array of index pointers that we can sort for
2146                  * the generator's use (for wading through the files in sorted
2147                  * order and for calling flist_find()).  We keep the "files"
2148                  * list unsorted for our exchange of index numbers with the
2149                  * other side (since their names may not sort the same). */
2150                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2151                         out_of_memory("recv_file_list");
2152                 memcpy(flist->sorted, flist->files,
2153                        flist->used * sizeof (struct file_struct*));
2154                 if (inc_recurse && dir_flist->used > dstart) {
2155                         static int dir_flist_malloced = 0;
2156                         if (dir_flist_malloced < dir_flist->malloced) {
2157                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2158                                                         struct file_struct *,
2159                                                         dir_flist->malloced);
2160                                 dir_flist_malloced = dir_flist->malloced;
2161                         }
2162                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2163                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2164                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2165                 }
2166         } else {
2167                 flist->sorted = flist->files;
2168                 if (inc_recurse && dir_flist->used > dstart) {
2169                         dir_flist->sorted = dir_flist->files;
2170                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2171                 }
2172         }
2173
2174         if (inc_recurse)
2175                 flist_done_allocating(flist);
2176         else if (f >= 0)
2177                 recv_id_list(f, flist);
2178
2179         flist_sort_and_clean(flist, relative_paths);
2180
2181         if (protocol_version < 30) {
2182                 /* Recv the io_error flag */
2183                 if (ignore_errors)
2184                         read_int(f);
2185                 else
2186                         io_error |= read_int(f);
2187         } else if (inc_recurse && flist->ndx_start == 1) {
2188                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0) 
2189                         flist->parent_ndx = -1;
2190         }
2191
2192         if (verbose > 3)
2193                 output_flist(flist);
2194
2195         if (verbose > 2)
2196                 rprintf(FINFO, "recv_file_list done\n");
2197
2198         stats.flist_size += stats.total_read - start_read;
2199         stats.num_files += flist->used;
2200
2201         return flist;
2202 }
2203
2204 /* This is only used once by the receiver if the very first file-list
2205  * has exactly one item in it. */
2206 void recv_additional_file_list(int f)
2207 {
2208         struct file_list *flist;
2209         int ndx = read_ndx(f);
2210         if (ndx == NDX_FLIST_EOF) {
2211                 flist_eof = 1;
2212                 change_local_filter_dir(NULL, 0, 0);
2213         } else {
2214                 ndx = NDX_FLIST_OFFSET - ndx;
2215                 if (ndx < 0 || ndx >= dir_flist->used) {
2216                         ndx = NDX_FLIST_OFFSET - ndx;
2217                         rprintf(FERROR,
2218                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2219                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2220                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2221                         exit_cleanup(RERR_PROTOCOL);
2222                 }
2223                 if (verbose > 3) {
2224                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2225                                 who_am_i(), ndx);
2226                 }
2227                 flist = recv_file_list(f);
2228                 flist->parent_ndx = ndx;
2229         }
2230 }
2231
2232 /* Search for an identically-named item in the file list.  Note that the
2233  * items must agree in their directory-ness, or no match is returned. */
2234 int flist_find(struct file_list *flist, struct file_struct *f)
2235 {
2236         int low = flist->low, high = flist->high;
2237         int diff, mid, mid_up;
2238
2239         while (low <= high) {
2240                 mid = (low + high) / 2;
2241                 if (F_IS_ACTIVE(flist->sorted[mid]))
2242                         mid_up = mid;
2243                 else {
2244                         /* Scan for the next non-empty entry using the cached
2245                          * distance values.  If the value isn't fully up-to-
2246                          * date, update it. */
2247                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2248                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2249                                 do {
2250                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2251                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2252                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2253                         }
2254                         if (mid_up > high) {
2255                                 /* If there's nothing left above us, set high to
2256                                  * a non-empty entry below us and continue. */
2257                                 high = mid - (int)flist->sorted[mid]->len32;
2258                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2259                                         do {
2260                                             high -= (int)flist->sorted[high]->len32;
2261                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2262                                         flist->sorted[mid]->len32 = mid - high;
2263                                 }
2264                                 continue;
2265                         }
2266                 }
2267                 diff = f_name_cmp(flist->sorted[mid_up], f);
2268                 if (diff == 0) {
2269                         if (protocol_version < 29
2270                             && S_ISDIR(flist->sorted[mid_up]->mode)
2271                             != S_ISDIR(f->mode))
2272                                 return -1;
2273                         return mid_up;
2274                 }
2275                 if (diff < 0)
2276                         low = mid_up + 1;
2277                 else
2278                         high = mid - 1;
2279         }
2280         return -1;
2281 }
2282
2283 /*
2284  * Free up any resources a file_struct has allocated
2285  * and clear the file.
2286  */
2287 void clear_file(struct file_struct *file)
2288 {
2289         /* The +1 zeros out the first char of the basename. */
2290         memset(file, 0, FILE_STRUCT_LEN + 1);
2291         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2292          * entry.  Likewise for len32 in the opposite direction.  We assume
2293          * that we're alone for now since flist_find() will adjust the counts
2294          * it runs into that aren't up-to-date. */
2295         file->len32 = F_DEPTH(file) = 1;
2296 }
2297
2298 /* Allocate a new file list. */
2299 struct file_list *flist_new(int flags, char *msg)
2300 {
2301         struct file_list *flist;
2302
2303         if (!(flist = new0(struct file_list)))
2304                 out_of_memory(msg);
2305
2306         if (flags & FLIST_TEMP) {
2307                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2308                                                 out_of_memory, POOL_INTERN)))
2309                         out_of_memory(msg);
2310         } else {
2311                 /* This is a doubly linked list with prev looping back to
2312                  * the end of the list, but the last next pointer is NULL. */
2313                 if (!first_flist) {
2314                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2315                                                 out_of_memory, POOL_INTERN);
2316                         if (!flist->file_pool)
2317                                 out_of_memory(msg);
2318
2319                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2320
2321                         first_flist = cur_flist = flist->prev = flist;
2322                 } else {
2323                         struct file_list *prev = first_flist->prev;
2324
2325                         flist->file_pool = first_flist->file_pool;
2326
2327                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2328                         flist->flist_num = prev->flist_num + 1;
2329
2330                         flist->prev = prev;
2331                         prev->next = first_flist->prev = flist;
2332                 }
2333                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2334                 flist_cnt++;
2335         }
2336
2337         return flist;
2338 }
2339
2340 /* Free up all elements in a flist. */
2341 void flist_free(struct file_list *flist)
2342 {
2343         if (!flist->prev) {
2344                 /* Was FLIST_TEMP dir-list. */
2345         } else if (flist == flist->prev) {
2346                 first_flist = cur_flist = NULL;
2347                 file_total = 0;
2348                 flist_cnt = 0;
2349         } else {
2350                 if (flist == cur_flist)
2351                         cur_flist = flist->next;
2352                 if (flist == first_flist)
2353                         first_flist = first_flist->next;
2354                 else {
2355                         flist->prev->next = flist->next;
2356                         if (!flist->next)
2357                                 flist->next = first_flist;
2358                 }
2359                 flist->next->prev = flist->prev;
2360                 file_total -= flist->used;
2361                 flist_cnt--;
2362         }
2363
2364         if (!flist->prev || !flist_cnt)
2365                 pool_destroy(flist->file_pool);
2366         else
2367                 pool_free_old(flist->file_pool, flist->pool_boundary);
2368
2369         if (flist->sorted && flist->sorted != flist->files)
2370                 free(flist->sorted);
2371         free(flist->files);
2372         free(flist);
2373 }
2374
2375 /* This routine ensures we don't have any duplicate names in our file list.
2376  * duplicate names can cause corruption because of the pipelining. */
2377 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2378 {
2379         char fbuf[MAXPATHLEN];
2380         int i, prev_i;
2381
2382         if (!flist)
2383                 return;
2384         if (flist->used == 0) {
2385                 flist->high = -1;
2386                 flist->low = 0;
2387                 return;
2388         }
2389
2390         fsort(flist->sorted, flist->used);
2391
2392         if (!am_sender || inc_recurse) {
2393                 for (i = prev_i = 0; i < flist->used; i++) {
2394                         if (F_IS_ACTIVE(flist->sorted[i])) {
2395                                 prev_i = i;
2396                                 break;
2397                         }
2398                 }
2399                 flist->low = prev_i;
2400         } else {
2401                 i = prev_i = flist->used - 1;
2402                 flist->low = 0;
2403         }
2404
2405         while (++i < flist->used) {
2406                 int j;
2407                 struct file_struct *file = flist->sorted[i];
2408
2409                 if (!F_IS_ACTIVE(file))
2410                         continue;
2411                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2412                         j = prev_i;
2413                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2414                         int save_mode = file->mode;
2415                         /* Make sure that this directory doesn't duplicate a
2416                          * non-directory earlier in the list. */
2417                         flist->high = prev_i;
2418                         file->mode = S_IFREG;
2419                         j = flist_find(flist, file);
2420                         file->mode = save_mode;
2421                 } else
2422                         j = -1;
2423                 if (j >= 0) {
2424                         int keep, drop;
2425                         /* If one is a dir and the other is not, we want to
2426                          * keep the dir because it might have contents in the
2427                          * list.  Otherwise keep the first one. */
2428                         if (S_ISDIR(file->mode)) {
2429                                 struct file_struct *fp = flist->sorted[j];
2430                                 if (!S_ISDIR(fp->mode))
2431                                         keep = i, drop = j;
2432                                 else {
2433                                         if (am_sender)
2434                                                 file->flags |= FLAG_DUPLICATE;
2435                                         else { /* Make sure we merge our vital flags. */
2436                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2437                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2438                                         }
2439                                         keep = j, drop = i;
2440                                 }
2441                         } else
2442                                 keep = j, drop = i;
2443
2444                         if (!am_sender) {
2445                                 if (verbose > 1) {
2446                                         rprintf(FINFO,
2447                                             "removing duplicate name %s from file list (%d)\n",
2448                                             f_name(file, fbuf), drop + flist->ndx_start);
2449                                 }
2450                                 clear_file(flist->sorted[drop]);
2451                         }
2452
2453                         if (keep == i) {
2454                                 if (flist->low == drop) {
2455                                         for (j = drop + 1;
2456                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2457                                              j++) {}
2458                                         flist->low = j;
2459                                 }
2460                                 prev_i = i;
2461                         }
2462                 } else
2463                         prev_i = i;
2464         }
2465         flist->high = prev_i;
2466
2467         if (strip_root) {
2468                 /* We need to strip off the leading slashes for relative
2469                  * paths, but this must be done _after_ the sorting phase. */
2470                 for (i = flist->low; i <= flist->high; i++) {
2471                         struct file_struct *file = flist->sorted[i];
2472
2473                         if (!file->dirname)
2474                                 continue;
2475                         while (*file->dirname == '/')
2476                                 file->dirname++;
2477                         if (!*file->dirname)
2478                                 file->dirname = NULL;
2479                 }
2480         }
2481
2482         if (prune_empty_dirs && !am_sender) {
2483                 int j, prev_depth = 0;
2484
2485                 prev_i = 0; /* It's OK that this isn't really true. */
2486
2487                 for (i = flist->low; i <= flist->high; i++) {
2488                         struct file_struct *fp, *file = flist->sorted[i];
2489
2490                         /* This temporarily abuses the F_DEPTH() value for a
2491                          * directory that is in a chain that might get pruned.
2492                          * We restore the old value if it gets a reprieve. */
2493                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2494                                 /* Dump empty dirs when coming back down. */
2495                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2496                                         fp = flist->sorted[prev_i];
2497                                         if (F_DEPTH(fp) >= 0)
2498                                                 break;
2499                                         prev_i = -F_DEPTH(fp)-1;
2500                                         clear_file(fp);
2501                                 }
2502                                 prev_depth = F_DEPTH(file);
2503                                 if (is_excluded(f_name(file, fbuf), 1,
2504                                                        ALL_FILTERS)) {
2505                                         /* Keep dirs through this dir. */
2506                                         for (j = prev_depth-1; ; j--) {
2507                                                 fp = flist->sorted[prev_i];
2508                                                 if (F_DEPTH(fp) >= 0)
2509                                                         break;
2510                                                 prev_i = -F_DEPTH(fp)-1;
2511                                                 F_DEPTH(fp) = j;
2512                                         }
2513                                 } else
2514                                         F_DEPTH(file) = -prev_i-1;
2515                                 prev_i = i;
2516                         } else {
2517                                 /* Keep dirs through this non-dir. */
2518                                 for (j = prev_depth; ; j--) {
2519                                         fp = flist->sorted[prev_i];
2520                                         if (F_DEPTH(fp) >= 0)
2521                                                 break;
2522                                         prev_i = -F_DEPTH(fp)-1;
2523                                         F_DEPTH(fp) = j;
2524                                 }
2525                         }
2526                 }
2527                 /* Dump all remaining empty dirs. */
2528                 while (1) {
2529                         struct file_struct *fp = flist->sorted[prev_i];
2530                         if (F_DEPTH(fp) >= 0)
2531                                 break;
2532                         prev_i = -F_DEPTH(fp)-1;
2533                         clear_file(fp);
2534                 }
2535
2536                 for (i = flist->low; i <= flist->high; i++) {
2537                         if (F_IS_ACTIVE(flist->sorted[i]))
2538                                 break;
2539                 }
2540                 flist->low = i;
2541                 for (i = flist->high; i >= flist->low; i--) {
2542                         if (F_IS_ACTIVE(flist->sorted[i]))
2543                                 break;
2544                 }
2545                 flist->high = i;
2546         }
2547 }
2548
2549 static void output_flist(struct file_list *flist)
2550 {
2551         char uidbuf[16], gidbuf[16], depthbuf[16];
2552         struct file_struct *file;
2553         const char *root, *dir, *slash, *name, *trail;
2554         const char *who = who_am_i();
2555         int i;
2556
2557         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2558                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2559         for (i = 0; i < flist->used; i++) {
2560                 file = flist->files[i];
2561                 if ((am_root || am_sender) && uid_ndx) {
2562                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2563                                  F_OWNER(file));
2564                 } else
2565                         *uidbuf = '\0';
2566                 if (gid_ndx) {
2567                         static char parens[] = "(\0)\0\0\0";
2568                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2569                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2570                                  pp, F_GROUP(file), pp + 2);
2571                 } else
2572                         *gidbuf = '\0';
2573                 if (!am_sender)
2574                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2575                 if (F_IS_ACTIVE(file)) {
2576                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2577                         if ((dir = file->dirname) == NULL)
2578                                 dir = slash = "";
2579                         else
2580                                 slash = "/";
2581                         name = file->basename;
2582                         trail = S_ISDIR(file->mode) ? "/" : "";
2583                 } else
2584                         root = dir = slash = name = trail = "";
2585                 rprintf(FINFO,
2586                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2587                         who, i + flist->ndx_start,
2588                         root, dir, slash, name, trail,
2589                         (int)file->mode, (double)F_LENGTH(file),
2590                         uidbuf, gidbuf, file->flags);
2591         }
2592 }
2593
2594 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2595 enum fnc_type { t_PATH, t_ITEM };
2596
2597 static int found_prefix;
2598
2599 /* Compare the names of two file_struct entities, similar to how strcmp()
2600  * would do if it were operating on the joined strings.
2601  *
2602  * Some differences beginning with protocol_version 29: (1) directory names
2603  * are compared with an assumed trailing slash so that they compare in a
2604  * way that would cause them to sort immediately prior to any content they
2605  * may have; (2) a directory of any name compares after a non-directory of
2606  * any name at the same depth; (3) a directory with name "." compares prior
2607  * to anything else.  These changes mean that a directory and a non-dir
2608  * with the same name will not compare as equal (protocol_version >= 29).
2609  *
2610  * The dirname component can be an empty string, but the basename component
2611  * cannot (and never is in the current codebase).  The basename component
2612  * may be NULL (for a removed item), in which case it is considered to be
2613  * after any existing item. */
2614 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2615 {
2616         int dif;
2617         const uchar *c1, *c2;
2618         enum fnc_state state1, state2;
2619         enum fnc_type type1, type2;
2620         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2621
2622         if (!f1 || !F_IS_ACTIVE(f1)) {
2623                 if (!f2 || !F_IS_ACTIVE(f2))
2624                         return 0;
2625                 return -1;
2626         }
2627         if (!f2 || !F_IS_ACTIVE(f2))
2628                 return 1;
2629
2630         c1 = (uchar*)f1->dirname;
2631         c2 = (uchar*)f2->dirname;
2632         if (c1 == c2)
2633                 c1 = c2 = NULL;
2634         if (!c1) {
2635                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2636                 c1 = (const uchar*)f1->basename;
2637                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2638                         type1 = t_ITEM;
2639                         state1 = s_TRAILING;
2640                         c1 = (uchar*)"";
2641                 } else
2642                         state1 = s_BASE;
2643         } else {
2644                 type1 = t_path;
2645                 state1 = s_DIR;
2646         }
2647         if (!c2) {
2648                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2649                 c2 = (const uchar*)f2->basename;
2650                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2651                         type2 = t_ITEM;
2652                         state2 = s_TRAILING;
2653                         c2 = (uchar*)"";
2654                 } else
2655                         state2 = s_BASE;
2656         } else {
2657                 type2 = t_path;
2658                 state2 = s_DIR;
2659         }
2660
2661         if (type1 != type2)
2662                 return type1 == t_PATH ? 1 : -1;
2663
2664         do {
2665                 if (!*c1) {
2666                         switch (state1) {
2667                         case s_DIR:
2668                                 state1 = s_SLASH;
2669                                 c1 = (uchar*)"/";
2670                                 break;
2671                         case s_SLASH:
2672                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2673                                 c1 = (const uchar*)f1->basename;
2674                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2675                                         type1 = t_ITEM;
2676                                         state1 = s_TRAILING;
2677                                         c1 = (uchar*)"";
2678                                 } else
2679                                         state1 = s_BASE;
2680                                 break;
2681                         case s_BASE:
2682                                 state1 = s_TRAILING;
2683                                 if (type1 == t_PATH) {
2684                                         c1 = (uchar*)"/";
2685                                         break;
2686                                 }
2687                                 /* FALL THROUGH */
2688                         case s_TRAILING:
2689                                 type1 = t_ITEM;
2690                                 break;
2691                         }
2692                         if (*c2 && type1 != type2)
2693                                 return type1 == t_PATH ? 1 : -1;
2694                 }
2695                 if (!*c2) {
2696                         switch (state2) {
2697                         case s_DIR:
2698                                 state2 = s_SLASH;
2699                                 c2 = (uchar*)"/";
2700                                 break;
2701                         case s_SLASH:
2702                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2703                                 c2 = (const uchar*)f2->basename;
2704                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2705                                         type2 = t_ITEM;
2706                                         state2 = s_TRAILING;
2707                                         c2 = (uchar*)"";
2708                                 } else
2709                                         state2 = s_BASE;
2710                                 break;
2711                         case s_BASE:
2712                                 state2 = s_TRAILING;
2713                                 if (type2 == t_PATH) {
2714                                         c2 = (uchar*)"/";
2715                                         break;
2716                                 }
2717                                 /* FALL THROUGH */
2718                         case s_TRAILING:
2719                                 found_prefix = 1;
2720                                 if (!*c1)
2721                                         return 0;
2722                                 type2 = t_ITEM;
2723                                 break;
2724                         }
2725                         if (type1 != type2)
2726                                 return type1 == t_PATH ? 1 : -1;
2727                 }
2728         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2729
2730         return dif;
2731 }
2732
2733 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2734  * not match if f2's basename is not an exact match of a path element in f1.
2735  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2736 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2737 {
2738         found_prefix = 0;
2739         f_name_cmp(f1, f2);
2740         return found_prefix;
2741 }
2742
2743 char *f_name_buf(void)
2744 {
2745         static char names[5][MAXPATHLEN];
2746         static unsigned int n;
2747
2748         n = (n + 1) % (sizeof names / sizeof names[0]);
2749
2750         return names[n];
2751 }
2752
2753 /* Return a copy of the full filename of a flist entry, using the indicated
2754  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2755  * done because we checked the size when creating the file_struct entry.
2756  */
2757 char *f_name(const struct file_struct *f, char *fbuf)
2758 {
2759         if (!f || !F_IS_ACTIVE(f))
2760                 return NULL;
2761
2762         if (!fbuf)
2763                 fbuf = f_name_buf();
2764
2765         if (f->dirname) {
2766                 int len = strlen(f->dirname);
2767                 memcpy(fbuf, f->dirname, len);
2768                 fbuf[len] = '/';
2769                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2770         } else
2771                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2772
2773         return fbuf;
2774 }
2775
2776 /* Do a non-recursive scan of the named directory, possibly ignoring all
2777  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2778  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2779  * buffer (the functions we call will append names onto the end, but the old
2780  * dir value will be restored on exit). */
2781 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2782 {
2783         struct file_list *dirlist;
2784         char dirbuf[MAXPATHLEN];
2785         int save_recurse = recurse;
2786         int save_xfer_dirs = xfer_dirs;
2787         int save_prune_empty_dirs = prune_empty_dirs;
2788
2789         if (dlen < 0) {
2790                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2791                 if (dlen >= MAXPATHLEN)
2792                         return NULL;
2793                 dirname = dirbuf;
2794         }
2795
2796         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2797
2798         recurse = 0;
2799         xfer_dirs = 1;
2800         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2801         xfer_dirs = save_xfer_dirs;
2802         recurse = save_recurse;
2803         if (do_progress)
2804                 flist_count_offset += dirlist->used;
2805
2806         prune_empty_dirs = 0;
2807         dirlist->sorted = dirlist->files;
2808         flist_sort_and_clean(dirlist, 0);
2809         prune_empty_dirs = save_prune_empty_dirs;
2810
2811         if (verbose > 3)
2812                 output_flist(dirlist);
2813
2814         return dirlist;
2815 }