Fixed a thinko and a typo in the --append option.
[rsync.git] / flist.c
1 /*
2  * Generate and receive file lists.
3  *
4  * Copyright (C) 1996 Andrew Tridgell
5  * Copyright (C) 1996 Paul Mackerras
6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7  * Copyright (C) 2002-2008 Wayne Davison
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, visit the http://fsf.org website.
21  */
22
23 #include "rsync.h"
24 #include "ifuncs.h"
25 #include "rounding.h"
26 #include "io.h"
27
28 extern int 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_uid;
48 extern int preserve_gid;
49 extern int preserve_acls;
50 extern int preserve_xattrs;
51 extern int preserve_links;
52 extern int preserve_hard_links;
53 extern int preserve_devices;
54 extern int preserve_specials;
55 extern int uid_ndx;
56 extern int gid_ndx;
57 extern int eol_nulls;
58 extern int relative_paths;
59 extern int implied_dirs;
60 extern int file_extra_cnt;
61 extern int ignore_perishable;
62 extern int non_perishable_cnt;
63 extern int prune_empty_dirs;
64 extern int copy_links;
65 extern int copy_unsafe_links;
66 extern int protocol_version;
67 extern int sanitize_paths;
68 extern int munge_symlinks;
69 extern int need_unsorted_flist;
70 extern int unsort_ndx;
71 extern struct stats stats;
72 extern char *filesfrom_host;
73
74 extern char curr_dir[MAXPATHLEN];
75
76 extern struct chmod_mode_struct *chmod_modes;
77
78 extern struct filter_list_struct filter_list;
79 extern struct filter_list_struct server_filter_list;
80
81 #ifdef ICONV_OPTION
82 extern int filesfrom_convert;
83 extern iconv_t ic_send, ic_recv;
84 #endif
85
86 #define PTR_SIZE (sizeof (struct file_struct *))
87
88 int io_error;
89 int checksum_len;
90 dev_t filesystem_dev; /* used to implement -x */
91
92 struct file_list *cur_flist, *first_flist, *dir_flist;
93 int send_dir_ndx = -1, send_dir_depth = -1;
94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
95 int file_total = 0; /* total of all active items over all file-lists */
96 int flist_eof = 0; /* all the file-lists are now known */
97
98 #define NORMAL_NAME 0
99 #define SLASH_ENDING_NAME 1
100 #define DOT_NAME 2
101
102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
103  * internally, even if this platform does not allow files to have 64-bit inums.
104  * The only exception is if we're on a platform with no 64-bit type at all.
105  *
106  * Because we use read_longint() to get these off the wire, if you transfer
107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
108  * machine with no 64-bit types then you will get an overflow error.
109  *
110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
112  * be truncated.  But it's a kind of silly thing to do anyhow. */
113
114 /* The tmp_* vars are used as a cache area by make_file() to store data
115  * that the sender doesn't need to remember in its file list.  The data
116  * will survive just long enough to be used by send_file_entry(). */
117 static dev_t tmp_rdev;
118 #ifdef SUPPORT_HARD_LINKS
119 static int64 tmp_dev, tmp_ino;
120 #endif
121 static char tmp_sum[MAX_DIGEST_LEN];
122
123 static char empty_sum[MAX_DIGEST_LEN];
124 static int flist_count_offset; /* for --delete --progress */
125 static int dir_count = 0;
126
127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
128 static void output_flist(struct file_list *flist);
129
130 void init_flist(void)
131 {
132         if (verbose > 4) {
133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
135         }
136         checksum_len = protocol_version < 21 ? 2
137                      : protocol_version < 30 ? MD4_DIGEST_LEN
138                      : MD5_DIGEST_LEN;
139 }
140
141 static int show_filelist_p(void)
142 {
143         return verbose && xfer_dirs && !am_server && !inc_recurse;
144 }
145
146 static void start_filelist_progress(char *kind)
147 {
148         rprintf(FCLIENT, "%s ... ", kind);
149         if (verbose > 1 || do_progress)
150                 rprintf(FCLIENT, "\n");
151         rflush(FINFO);
152 }
153
154 static void emit_filelist_progress(int count)
155 {
156         rprintf(FCLIENT, " %d files...\r", count);
157 }
158
159 static void maybe_emit_filelist_progress(int count)
160 {
161         if (do_progress && show_filelist_p() && (count % 100) == 0)
162                 emit_filelist_progress(count);
163 }
164
165 static void finish_filelist_progress(const struct file_list *flist)
166 {
167         if (do_progress) {
168                 /* This overwrites the progress line */
169                 rprintf(FINFO, "%d file%sto consider\n",
170                         flist->used, flist->used == 1 ? " " : "s ");
171         } else
172                 rprintf(FINFO, "done\n");
173 }
174
175 void show_flist_stats(void)
176 {
177         /* Nothing yet */
178 }
179
180 /* Stat either a symlink or its referent, depending on the settings of
181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
182  *
183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
184  * MAXPATHLEN chars) will be set to the symlink's target string.
185  *
186  * The stat structure pointed to by stp will contain information about the
187  * link or the referent as appropriate, if they exist. */
188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
189 {
190 #ifdef SUPPORT_LINKS
191         if (link_stat(path, stp, copy_dirlinks) < 0)
192                 return -1;
193         if (S_ISLNK(stp->st_mode)) {
194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
195                 if (llen < 0)
196                         return -1;
197                 linkbuf[llen] = '\0';
198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
199                         if (verbose > 1) {
200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
201                                         path, linkbuf);
202                         }
203                         return x_stat(path, stp, NULL);
204                 }
205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
208                                 llen - SYMLINK_PREFIX_LEN + 1);
209                 }
210         }
211         return 0;
212 #else
213         return x_stat(path, stp, NULL);
214 #endif
215 }
216
217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
218 {
219 #ifdef SUPPORT_LINKS
220         if (copy_links)
221                 return x_stat(path, stp, NULL);
222         if (x_lstat(path, stp, NULL) < 0)
223                 return -1;
224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
225                 STRUCT_STAT st;
226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
227                         *stp = st;
228         }
229         return 0;
230 #else
231         return x_stat(path, stp, NULL);
232 #endif
233 }
234
235 /* This function is used to check if a file should be included/excluded
236  * from the list of files based on its name and type etc.  The value of
237  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
238 static int is_excluded(char *fname, int is_dir, int filter_level)
239 {
240 #if 0 /* This currently never happens, so avoid a useless compare. */
241         if (filter_level == NO_FILTERS)
242                 return 0;
243 #endif
244         if (fname) {
245                 /* never exclude '.', even if somebody does --exclude '*' */
246                 if (fname[0] == '.' && !fname[1])
247                         return 0;
248                 /* Handle the -R version of the '.' dir. */
249                 if (fname[0] == '/') {
250                         int len = strlen(fname);
251                         if (fname[len-1] == '.' && fname[len-2] == '/')
252                                 return 0;
253                 }
254         }
255         if (server_filter_list.head
256             && check_filter(&server_filter_list, fname, is_dir) < 0)
257                 return 1;
258         if (filter_level != ALL_FILTERS)
259                 return 0;
260         if (filter_list.head
261             && check_filter(&filter_list, fname, is_dir) < 0)
262                 return 1;
263         return 0;
264 }
265
266 static void send_directory(int f, struct file_list *flist,
267                            char *fbuf, int len, int flags);
268
269 static const char *pathname, *orig_dir;
270 static int pathname_len;
271
272
273 /* Make sure flist can hold at least flist->used + extra entries. */
274 static void flist_expand(struct file_list *flist, int extra)
275 {
276         struct file_struct **new_ptr;
277
278         if (flist->used + extra <= flist->malloced)
279                 return;
280
281         if (flist->malloced < FLIST_START)
282                 flist->malloced = FLIST_START;
283         else if (flist->malloced >= FLIST_LINEAR)
284                 flist->malloced += FLIST_LINEAR;
285         else
286                 flist->malloced *= 2;
287
288         /* In case count jumped or we are starting the list
289          * with a known size just set it. */
290         if (flist->malloced < flist->used + extra)
291                 flist->malloced = flist->used + extra;
292
293         new_ptr = realloc_array(flist->files, struct file_struct *,
294                                 flist->malloced);
295
296         if (verbose >= 2 && flist->malloced != FLIST_START) {
297                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
298                     who_am_i(),
299                     (double)sizeof flist->files[0] * flist->malloced,
300                     (new_ptr == flist->files) ? " not" : "");
301         }
302
303         flist->files = new_ptr;
304
305         if (!flist->files)
306                 out_of_memory("flist_expand");
307 }
308
309 static void flist_done_allocating(struct file_list *flist)
310 {
311         void *ptr = pool_boundary(flist->file_pool, 8*1024);
312         if (flist->pool_boundary == ptr)
313                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
314         else
315                 flist->pool_boundary = ptr;
316 }
317
318 int push_pathname(const char *dir, int len)
319 {
320         if (dir == pathname)
321                 return 1;
322
323         if (!orig_dir)
324                 orig_dir = strdup(curr_dir);
325
326         if (pathname && !pop_dir(orig_dir)) {
327                 rsyserr(FERROR, errno, "pop_dir %s failed",
328                         full_fname(orig_dir));
329                 exit_cleanup(RERR_FILESELECT);
330         }
331
332         if (dir && !push_dir(dir, 0)) {
333                 io_error |= IOERR_GENERAL;
334                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
335                         full_fname(dir), curr_dir);
336                 return 0;
337         }
338
339         pathname = dir;
340         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
341
342         return 1;
343 }
344
345 static void send_file_entry(int f, struct file_struct *file, int ndx, int first_ndx)
346 {
347         static time_t modtime;
348         static mode_t mode;
349 #ifdef SUPPORT_HARD_LINKS
350         static int64 dev;
351 #endif
352         static dev_t rdev;
353         static uint32 rdev_major;
354         static uid_t uid;
355         static gid_t gid;
356         static const char *user_name, *group_name;
357         static char lastname[MAXPATHLEN];
358         char fname[MAXPATHLEN];
359         int first_hlink_ndx = -1;
360         int l1, l2;
361         int xflags;
362
363 #ifdef ICONV_OPTION
364         if (ic_send != (iconv_t)-1) {
365                 xbuf outbuf, inbuf;
366
367                 INIT_CONST_XBUF(outbuf, fname);
368
369                 if (file->dirname) {
370                         INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
371                         outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
372                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
373                                 goto convert_error;
374                         outbuf.size += 2;
375                         outbuf.buf[outbuf.len++] = '/';
376                 }
377
378                 INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
379                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
380                   convert_error:
381                         io_error |= IOERR_GENERAL;
382                         rprintf(FINFO,
383                             "[%s] cannot convert filename: %s (%s)\n",
384                             who_am_i(), f_name(file, fname), strerror(errno));
385                         return;
386                 }
387                 outbuf.buf[outbuf.len] = '\0';
388         } else
389 #endif
390                 f_name(file, fname);
391
392         /* Initialize starting value of xflags. */
393         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
394                 dir_count++;
395                 if (file->flags & FLAG_CONTENT_DIR)
396                         xflags = file->flags & FLAG_TOP_DIR;
397                 else if (file->flags & FLAG_IMPLIED_DIR)
398                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
399                 else
400                         xflags = XMIT_NO_CONTENT_DIR;
401         } else
402                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
403
404         if (file->mode == mode)
405                 xflags |= XMIT_SAME_MODE;
406         else
407                 mode = file->mode;
408
409         if ((preserve_devices && IS_DEVICE(mode))
410          || (preserve_specials && IS_SPECIAL(mode))) {
411                 if (protocol_version < 28) {
412                         if (tmp_rdev == rdev)
413                                 xflags |= XMIT_SAME_RDEV_pre28;
414                         else
415                                 rdev = tmp_rdev;
416                 } else {
417                         rdev = tmp_rdev;
418                         if ((uint32)major(rdev) == rdev_major)
419                                 xflags |= XMIT_SAME_RDEV_MAJOR;
420                         else
421                                 rdev_major = major(rdev);
422                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
423                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
424                 }
425         } else if (protocol_version < 28)
426                 rdev = MAKEDEV(0, 0);
427         if (preserve_uid) {
428                 if ((uid_t)F_OWNER(file) == uid && *lastname)
429                         xflags |= XMIT_SAME_UID;
430                 else {
431                         uid = F_OWNER(file);
432                         if (!numeric_ids) {
433                                 user_name = add_uid(uid);
434                                 if (inc_recurse && user_name)
435                                         xflags |= XMIT_USER_NAME_FOLLOWS;
436                         }
437                 }
438         }
439         if (preserve_gid) {
440                 if ((gid_t)F_GROUP(file) == gid && *lastname)
441                         xflags |= XMIT_SAME_GID;
442                 else {
443                         gid = F_GROUP(file);
444                         if (!numeric_ids) {
445                                 group_name = add_gid(gid);
446                                 if (inc_recurse && group_name)
447                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
448                         }
449                 }
450         }
451         if (file->modtime == modtime)
452                 xflags |= XMIT_SAME_TIME;
453         else
454                 modtime = file->modtime;
455
456 #ifdef SUPPORT_HARD_LINKS
457         if (tmp_dev != 0) {
458                 if (protocol_version >= 30) {
459                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
460                         first_hlink_ndx = (int32)(long)np->data - 1;
461                         if (first_hlink_ndx < 0) {
462                                 np->data = (void*)(long)(first_ndx + ndx + 1);
463                                 xflags |= XMIT_HLINK_FIRST;
464                         }
465                         xflags |= XMIT_HLINKED;
466                 } else {
467                         if (tmp_dev == dev) {
468                                 if (protocol_version >= 28)
469                                         xflags |= XMIT_SAME_DEV_pre30;
470                         } else
471                                 dev = tmp_dev;
472                         xflags |= XMIT_HLINKED;
473                 }
474         }
475 #endif
476
477         for (l1 = 0;
478             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
479             l1++) {}
480         l2 = strlen(fname+l1);
481
482         if (l1 > 0)
483                 xflags |= XMIT_SAME_NAME;
484         if (l2 > 255)
485                 xflags |= XMIT_LONG_NAME;
486
487         /* We must make sure we don't send a zero flag byte or the
488          * other end will terminate the flist transfer.  Note that
489          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
490          * it's harmless way to add a bit to the first flag byte. */
491         if (protocol_version >= 28) {
492                 if (!xflags && !S_ISDIR(mode))
493                         xflags |= XMIT_TOP_DIR;
494                 if ((xflags & 0xFF00) || !xflags) {
495                         xflags |= XMIT_EXTENDED_FLAGS;
496                         write_shortint(f, xflags);
497                 } else
498                         write_byte(f, xflags);
499         } else {
500                 if (!(xflags & 0xFF))
501                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
502                 write_byte(f, xflags);
503         }
504         if (xflags & XMIT_SAME_NAME)
505                 write_byte(f, l1);
506         if (xflags & XMIT_LONG_NAME)
507                 write_varint30(f, l2);
508         else
509                 write_byte(f, l2);
510         write_buf(f, fname + l1, l2);
511
512         if (first_hlink_ndx >= 0) {
513                 write_varint(f, first_hlink_ndx);
514                 if (first_hlink_ndx >= first_ndx)
515                         goto the_end;
516         }
517
518         write_varlong30(f, F_LENGTH(file), 3);
519         if (!(xflags & XMIT_SAME_TIME)) {
520                 if (protocol_version >= 30)
521                         write_varlong(f, modtime, 4);
522                 else
523                         write_int(f, modtime);
524         }
525         if (!(xflags & XMIT_SAME_MODE))
526                 write_int(f, to_wire_mode(mode));
527         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
528                 if (protocol_version < 30)
529                         write_int(f, uid);
530                 else {
531                         write_varint(f, uid);
532                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
533                                 int len = strlen(user_name);
534                                 write_byte(f, len);
535                                 write_buf(f, user_name, len);
536                         }
537                 }
538         }
539         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
540                 if (protocol_version < 30)
541                         write_int(f, gid);
542                 else {
543                         write_varint(f, gid);
544                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
545                                 int len = strlen(group_name);
546                                 write_byte(f, len);
547                                 write_buf(f, group_name, len);
548                         }
549                 }
550         }
551         if ((preserve_devices && IS_DEVICE(mode))
552          || (preserve_specials && IS_SPECIAL(mode))) {
553                 if (protocol_version < 28) {
554                         if (!(xflags & XMIT_SAME_RDEV_pre28))
555                                 write_int(f, (int)rdev);
556                 } else {
557                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
558                                 write_varint30(f, major(rdev));
559                         if (protocol_version >= 30)
560                                 write_varint(f, minor(rdev));
561                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
562                                 write_byte(f, minor(rdev));
563                         else
564                                 write_int(f, minor(rdev));
565                 }
566         }
567
568 #ifdef SUPPORT_LINKS
569         if (preserve_links && S_ISLNK(mode)) {
570                 const char *sl = F_SYMLINK(file);
571                 int len = strlen(sl);
572                 write_varint30(f, len);
573                 write_buf(f, sl, len);
574         }
575 #endif
576
577 #ifdef SUPPORT_HARD_LINKS
578         if (tmp_dev != 0 && protocol_version < 30) {
579                 if (protocol_version < 26) {
580                         /* 32-bit dev_t and ino_t */
581                         write_int(f, (int32)dev);
582                         write_int(f, (int32)tmp_ino);
583                 } else {
584                         /* 64-bit dev_t and ino_t */
585                         if (!(xflags & XMIT_SAME_DEV_pre30))
586                                 write_longint(f, dev);
587                         write_longint(f, tmp_ino);
588                 }
589         }
590 #endif
591
592         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
593                 const char *sum;
594                 if (S_ISREG(mode))
595                         sum = tmp_sum;
596                 else {
597                         /* Prior to 28, we sent a useless set of nulls. */
598                         sum = empty_sum;
599                 }
600                 write_buf(f, sum, checksum_len);
601         }
602
603   the_end:
604         strlcpy(lastname, fname, MAXPATHLEN);
605
606         if (S_ISREG(mode) || S_ISLNK(mode))
607                 stats.total_size += F_LENGTH(file);
608 }
609
610 static struct file_struct *recv_file_entry(struct file_list *flist,
611                                            int xflags, int f)
612 {
613         static int64 modtime;
614         static mode_t mode;
615 #ifdef SUPPORT_HARD_LINKS
616         static int64 dev;
617 #endif
618         static dev_t rdev;
619         static uint32 rdev_major;
620         static uid_t uid;
621         static gid_t gid;
622         static uint16 gid_flags;
623         static char lastname[MAXPATHLEN], *lastdir;
624         static int lastdir_depth, lastdir_len = -1;
625         static unsigned int del_hier_name_len = 0;
626         static int in_del_hier = 0;
627         char thisname[MAXPATHLEN];
628         unsigned int l1 = 0, l2 = 0;
629         int alloc_len, basename_len, linkname_len;
630         int extra_len = file_extra_cnt * EXTRA_LEN;
631         int first_hlink_ndx = -1;
632         OFF_T file_length;
633         const char *basename;
634         struct file_struct *file;
635         alloc_pool_t *pool;
636         char *bp;
637
638         if (xflags & XMIT_SAME_NAME)
639                 l1 = read_byte(f);
640
641         if (xflags & XMIT_LONG_NAME)
642                 l2 = read_varint30(f);
643         else
644                 l2 = read_byte(f);
645
646         if (l2 >= MAXPATHLEN - l1) {
647                 rprintf(FERROR,
648                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
649                         xflags, l1, l2, lastname, who_am_i());
650                 overflow_exit("recv_file_entry");
651         }
652
653         strlcpy(thisname, lastname, l1 + 1);
654         read_sbuf(f, &thisname[l1], l2);
655         thisname[l1 + l2] = 0;
656
657         /* Abuse basename_len for a moment... */
658         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
659
660 #ifdef ICONV_OPTION
661         if (ic_recv != (iconv_t)-1) {
662                 xbuf outbuf, inbuf;
663
664                 INIT_CONST_XBUF(outbuf, thisname);
665                 INIT_XBUF(inbuf, lastname, basename_len, -1);
666
667                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
668                         io_error |= IOERR_GENERAL;
669                         rprintf(FINFO,
670                             "[%s] cannot convert filename: %s (%s)\n",
671                             who_am_i(), lastname, strerror(errno));
672                         outbuf.len = 0;
673                 }
674                 outbuf.buf[outbuf.len] = '\0';
675         }
676 #endif
677
678         clean_fname(thisname, 0);
679
680         if (sanitize_paths)
681                 sanitize_path(thisname, thisname, "", 0);
682
683         if ((basename = strrchr(thisname, '/')) != NULL) {
684                 int len = basename++ - thisname;
685                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
686                         lastdir = new_array(char, len + 1);
687                         memcpy(lastdir, thisname, len);
688                         lastdir[len] = '\0';
689                         lastdir_len = len;
690                         lastdir_depth = count_dir_elements(lastdir);
691                 }
692         } else
693                 basename = thisname;
694         basename_len = strlen(basename) + 1; /* count the '\0' */
695
696 #ifdef SUPPORT_HARD_LINKS
697         if (protocol_version >= 30
698          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
699                 first_hlink_ndx = read_varint(f);
700                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
701                         rprintf(FERROR,
702                                 "hard-link reference out of range: %d (%d)\n",
703                                 first_hlink_ndx, flist->ndx_start + flist->used);
704                         exit_cleanup(RERR_PROTOCOL);
705                 }
706                 if (first_hlink_ndx >= flist->ndx_start) {
707                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
708                         file_length = F_LENGTH(first);
709                         modtime = first->modtime;
710                         mode = first->mode;
711                         if (preserve_uid)
712                                 uid = F_OWNER(first);
713                         if (preserve_gid)
714                                 gid = F_GROUP(first);
715                         if ((preserve_devices && IS_DEVICE(mode))
716                          || (preserve_specials && IS_SPECIAL(mode))) {
717                                 uint32 *devp = F_RDEV_P(first);
718                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
719                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
720                         }
721                         if (preserve_links && S_ISLNK(mode))
722                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
723                         else
724                                 linkname_len = 0;
725                         goto create_object;
726                 }
727         }
728 #endif
729
730         file_length = read_varlong30(f, 3);
731         if (!(xflags & XMIT_SAME_TIME)) {
732                 if (protocol_version >= 30) {
733                         modtime = read_varlong(f, 4);
734 #if SIZEOF_TIME_T < SIZEOF_INT64
735                         if (!am_generator && (int64)(time_t)modtime != modtime) {
736                                 rprintf(FERROR_XFER,
737                                     "Time value of %s truncated on receiver.\n",
738                                     lastname);
739                         }
740 #endif
741                 } else
742                         modtime = read_int(f);
743         }
744         if (!(xflags & XMIT_SAME_MODE))
745                 mode = from_wire_mode(read_int(f));
746
747         if (chmod_modes && !S_ISLNK(mode))
748                 mode = tweak_mode(mode, chmod_modes);
749
750         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
751                 if (protocol_version < 30)
752                         uid = (uid_t)read_int(f);
753                 else {
754                         uid = (uid_t)read_varint(f);
755                         if (xflags & XMIT_USER_NAME_FOLLOWS)
756                                 uid = recv_user_name(f, uid);
757                         else if (inc_recurse && am_root && !numeric_ids)
758                                 uid = match_uid(uid);
759                 }
760         }
761         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
762                 if (protocol_version < 30)
763                         gid = (gid_t)read_int(f);
764                 else {
765                         gid = (gid_t)read_varint(f);
766                         gid_flags = 0;
767                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
768                                 gid = recv_group_name(f, gid, &gid_flags);
769                         else if (inc_recurse && (!am_root || !numeric_ids))
770                                 gid = match_gid(gid, &gid_flags);
771                 }
772         }
773
774         if ((preserve_devices && IS_DEVICE(mode))
775          || (preserve_specials && IS_SPECIAL(mode))) {
776                 if (protocol_version < 28) {
777                         if (!(xflags & XMIT_SAME_RDEV_pre28))
778                                 rdev = (dev_t)read_int(f);
779                 } else {
780                         uint32 rdev_minor;
781                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
782                                 rdev_major = read_varint30(f);
783                         if (protocol_version >= 30)
784                                 rdev_minor = read_varint(f);
785                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
786                                 rdev_minor = read_byte(f);
787                         else
788                                 rdev_minor = read_int(f);
789                         rdev = MAKEDEV(rdev_major, rdev_minor);
790                 }
791                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
792                 file_length = 0;
793         } else if (protocol_version < 28)
794                 rdev = MAKEDEV(0, 0);
795
796 #ifdef SUPPORT_LINKS
797         if (preserve_links && S_ISLNK(mode)) {
798                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
799                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
800                         rprintf(FERROR, "overflow: linkname_len=%d\n",
801                                 linkname_len - 1);
802                         overflow_exit("recv_file_entry");
803                 }
804                 if (munge_symlinks)
805                         linkname_len += SYMLINK_PREFIX_LEN;
806         }
807         else
808 #endif
809                 linkname_len = 0;
810
811 #ifdef SUPPORT_HARD_LINKS
812   create_object:
813         if (preserve_hard_links) {
814                 if (protocol_version < 28 && S_ISREG(mode))
815                         xflags |= XMIT_HLINKED;
816                 if (xflags & XMIT_HLINKED)
817                         extra_len += (inc_recurse+1) * EXTRA_LEN;
818         }
819 #endif
820
821 #ifdef SUPPORT_ACLS
822         /* We need one or two index int32s when we're preserving ACLs. */
823         if (preserve_acls)
824                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
825 #endif
826
827         if (always_checksum && S_ISREG(mode))
828                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
829
830         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
831                 extra_len += EXTRA_LEN;
832
833         if (inc_recurse && S_ISDIR(mode)) {
834                 if (one_file_system) {
835                         /* Room to save the dir's device for -x */
836                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
837                 }
838                 pool = dir_flist->file_pool;
839         } else
840                 pool = flist->file_pool;
841
842 #if EXTRA_ROUNDING > 0
843         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
844                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
845 #endif
846
847         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
848                   + linkname_len;
849         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
850
851         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
852         bp += extra_len;
853         file = (struct file_struct *)bp;
854         bp += FILE_STRUCT_LEN;
855
856         memcpy(bp, basename, basename_len);
857         bp += basename_len + linkname_len; /* skip space for symlink too */
858
859 #ifdef SUPPORT_HARD_LINKS
860         if (xflags & XMIT_HLINKED)
861                 file->flags |= FLAG_HLINKED;
862 #endif
863         file->modtime = (time_t)modtime;
864         file->len32 = (uint32)file_length;
865         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
866                 file->flags |= FLAG_LENGTH64;
867                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
868         }
869         file->mode = mode;
870         if (preserve_uid)
871                 F_OWNER(file) = uid;
872         if (preserve_gid) {
873                 F_GROUP(file) = gid;
874                 file->flags |= gid_flags;
875         }
876         if (unsort_ndx)
877                 F_NDX(file) = flist->used + flist->ndx_start;
878
879         if (basename != thisname) {
880                 file->dirname = lastdir;
881                 F_DEPTH(file) = lastdir_depth + 1;
882         } else
883                 F_DEPTH(file) = 1;
884
885         if (S_ISDIR(mode)) {
886                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
887                         F_DEPTH(file)--;
888                 if (protocol_version >= 30) {
889                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
890                                 if (xflags & XMIT_TOP_DIR)
891                                         file->flags |= FLAG_TOP_DIR;
892                                 file->flags |= FLAG_CONTENT_DIR;
893                         } else if (xflags & XMIT_TOP_DIR)
894                                 file->flags |= FLAG_IMPLIED_DIR;
895                 } else if (xflags & XMIT_TOP_DIR) {
896                         in_del_hier = recurse;
897                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
898                         if (relative_paths && del_hier_name_len > 2
899                             && lastname[del_hier_name_len-1] == '.'
900                             && lastname[del_hier_name_len-2] == '/')
901                                 del_hier_name_len -= 2;
902                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
903                 } else if (in_del_hier) {
904                         if (!relative_paths || !del_hier_name_len
905                          || (l1 >= del_hier_name_len
906                           && lastname[del_hier_name_len] == '/'))
907                                 file->flags |= FLAG_CONTENT_DIR;
908                         else
909                                 in_del_hier = 0;
910                 }
911         }
912
913         if ((preserve_devices && IS_DEVICE(mode))
914          || (preserve_specials && IS_SPECIAL(mode))) {
915                 uint32 *devp = F_RDEV_P(file);
916                 DEV_MAJOR(devp) = major(rdev);
917                 DEV_MINOR(devp) = minor(rdev);
918         }
919
920 #ifdef SUPPORT_LINKS
921         if (linkname_len) {
922                 bp = (char*)file->basename + basename_len;
923                 if (first_hlink_ndx >= flist->ndx_start) {
924                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
925                         memcpy(bp, F_SYMLINK(first), linkname_len);
926                 } else if (munge_symlinks) {
927                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
928                         bp += SYMLINK_PREFIX_LEN;
929                         linkname_len -= SYMLINK_PREFIX_LEN;
930                         read_sbuf(f, bp, linkname_len - 1);
931                 } else {
932                         read_sbuf(f, bp, linkname_len - 1);
933                         if (sanitize_paths)
934                                 sanitize_path(bp, bp, "", lastdir_depth);
935                 }
936         }
937 #endif
938
939 #ifdef SUPPORT_HARD_LINKS
940         if (preserve_hard_links && xflags & XMIT_HLINKED) {
941                 if (protocol_version >= 30) {
942                         if (xflags & XMIT_HLINK_FIRST) {
943                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
944                         } else
945                                 F_HL_GNUM(file) = first_hlink_ndx;
946                 } else {
947                         static int32 cnt = 0;
948                         struct ht_int64_node *np;
949                         int64 ino;
950                         int32 ndx;
951                         if (protocol_version < 26) {
952                                 dev = read_int(f);
953                                 ino = read_int(f);
954                         } else {
955                                 if (!(xflags & XMIT_SAME_DEV_pre30))
956                                         dev = read_longint(f);
957                                 ino = read_longint(f);
958                         }
959                         np = idev_find(dev, ino);
960                         ndx = (int32)(long)np->data - 1;
961                         if (ndx < 0) {
962                                 ndx = cnt++;
963                                 np->data = (void*)(long)cnt;
964                         }
965                         F_HL_GNUM(file) = ndx;
966                 }
967         }
968 #endif
969
970         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
971                 if (S_ISREG(mode))
972                         bp = F_SUM(file);
973                 else {
974                         /* Prior to 28, we get a useless set of nulls. */
975                         bp = tmp_sum;
976                 }
977                 if (first_hlink_ndx >= flist->ndx_start) {
978                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
979                         memcpy(bp, F_SUM(first), checksum_len);
980                 } else
981                         read_buf(f, bp, checksum_len);
982         }
983
984 #ifdef SUPPORT_ACLS
985         if (preserve_acls && !S_ISLNK(mode))
986                 receive_acl(file, f);
987 #endif
988 #ifdef SUPPORT_XATTRS
989         if (preserve_xattrs)
990                 receive_xattr(file, f );
991 #endif
992
993         if (S_ISREG(mode) || S_ISLNK(mode))
994                 stats.total_size += file_length;
995
996         return file;
997 }
998
999 /* Create a file_struct for a named file by reading its stat() information
1000  * and performing extensive checks against global options.
1001  *
1002  * Returns a pointer to the new file struct, or NULL if there was an error
1003  * or this file should be excluded. */
1004 struct file_struct *make_file(const char *fname, struct file_list *flist,
1005                               STRUCT_STAT *stp, int flags, int filter_level)
1006 {
1007         static char *lastdir;
1008         static int lastdir_len = -1;
1009         struct file_struct *file;
1010         char thisname[MAXPATHLEN];
1011         char linkname[MAXPATHLEN];
1012         int alloc_len, basename_len, linkname_len;
1013         int extra_len = file_extra_cnt * EXTRA_LEN;
1014         const char *basename;
1015         alloc_pool_t *pool;
1016         STRUCT_STAT st;
1017         char *bp;
1018
1019         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1020                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1021                 return NULL;
1022         }
1023         clean_fname(thisname, 0);
1024         if (sanitize_paths)
1025                 sanitize_path(thisname, thisname, "", 0);
1026
1027         if (stp && S_ISDIR(stp->st_mode)) {
1028                 st = *stp; /* Needed for "symlink/." with --relative. */
1029                 *linkname = '\0'; /* make IBM code checker happy */
1030         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1031                 int save_errno = errno;
1032                 /* See if file is excluded before reporting an error. */
1033                 if (filter_level != NO_FILTERS
1034                  && (is_excluded(thisname, 0, filter_level)
1035                   || is_excluded(thisname, 1, filter_level))) {
1036                         if (ignore_perishable && save_errno != ENOENT)
1037                                 non_perishable_cnt++;
1038                         return NULL;
1039                 }
1040                 if (save_errno == ENOENT) {
1041 #ifdef SUPPORT_LINKS
1042                         /* When our options tell us to follow a symlink that
1043                          * points nowhere, tell the user about the symlink
1044                          * instead of giving a "vanished" message.  We only
1045                          * dereference a symlink if one of the --copy*links
1046                          * options was specified, so there's no need for the
1047                          * extra lstat() if one of these options isn't on. */
1048                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1049                          && x_lstat(thisname, &st, NULL) == 0
1050                          && S_ISLNK(st.st_mode)) {
1051                                 io_error |= IOERR_GENERAL;
1052                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1053                                         full_fname(thisname));
1054                         } else
1055 #endif
1056                         {
1057                                 enum logcode c = am_daemon && protocol_version < 28
1058                                                ? FERROR : FWARNING;
1059                                 io_error |= IOERR_VANISHED;
1060                                 rprintf(c, "file has vanished: %s\n",
1061                                         full_fname(thisname));
1062                         }
1063                 } else {
1064                         io_error |= IOERR_GENERAL;
1065                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1066                                 full_fname(thisname));
1067                 }
1068                 return NULL;
1069         }
1070
1071         /* backup.c calls us with filter_level set to NO_FILTERS. */
1072         if (filter_level == NO_FILTERS)
1073                 goto skip_filters;
1074
1075         if (S_ISDIR(st.st_mode)) {
1076                 if (!xfer_dirs) {
1077                         rprintf(FINFO, "skipping directory %s\n", thisname);
1078                         return NULL;
1079                 }
1080                 /* -x only affects dirs because we need to avoid recursing
1081                  * into a mount-point directory, not to avoid copying a
1082                  * symlinked file if -L (or similar) was specified. */
1083                 if (one_file_system && st.st_dev != filesystem_dev
1084                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1085                         if (one_file_system > 1) {
1086                                 if (verbose > 1) {
1087                                         rprintf(FINFO,
1088                                             "[%s] skipping mount-point dir %s\n",
1089                                             who_am_i(), thisname);
1090                                 }
1091                                 return NULL;
1092                         }
1093                         flags |= FLAG_MOUNT_DIR;
1094                         flags &= ~FLAG_CONTENT_DIR;
1095                 }
1096         } else
1097                 flags &= ~FLAG_CONTENT_DIR;
1098
1099         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1100                 if (ignore_perishable)
1101                         non_perishable_cnt++;
1102                 return NULL;
1103         }
1104
1105         if (lp_ignore_nonreadable(module_id)) {
1106 #ifdef SUPPORT_LINKS
1107                 if (!S_ISLNK(st.st_mode))
1108 #endif
1109                         if (access(thisname, R_OK) != 0)
1110                                 return NULL;
1111         }
1112
1113   skip_filters:
1114
1115         /* Only divert a directory in the main transfer. */
1116         if (flist) {
1117                 if (flist->prev && S_ISDIR(st.st_mode)
1118                  && flags & FLAG_DIVERT_DIRS) {
1119                         /* Room for parent/sibling/next-child info. */
1120                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1121                         if (relative_paths)
1122                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1123                         pool = dir_flist->file_pool;
1124                 } else
1125                         pool = flist->file_pool;
1126         } else
1127                 pool = NULL;
1128
1129         if (verbose > 2) {
1130                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1131                         who_am_i(), thisname, filter_level);
1132         }
1133
1134         if ((basename = strrchr(thisname, '/')) != NULL) {
1135                 int len = basename++ - thisname;
1136                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1137                         lastdir = new_array(char, len + 1);
1138                         memcpy(lastdir, thisname, len);
1139                         lastdir[len] = '\0';
1140                         lastdir_len = len;
1141                 }
1142         } else
1143                 basename = thisname;
1144         basename_len = strlen(basename) + 1; /* count the '\0' */
1145
1146 #ifdef SUPPORT_LINKS
1147         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1148 #else
1149         linkname_len = 0;
1150 #endif
1151
1152         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1153                 extra_len += EXTRA_LEN;
1154
1155 #if EXTRA_ROUNDING > 0
1156         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1157                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1158 #endif
1159
1160         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1161                   + linkname_len;
1162         if (pool)
1163                 bp = pool_alloc(pool, alloc_len, "make_file");
1164         else {
1165                 if (!(bp = new_array(char, alloc_len)))
1166                         out_of_memory("make_file");
1167         }
1168
1169         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1170         bp += extra_len;
1171         file = (struct file_struct *)bp;
1172         bp += FILE_STRUCT_LEN;
1173
1174         memcpy(bp, basename, basename_len);
1175         bp += basename_len + linkname_len; /* skip space for symlink too */
1176
1177 #ifdef SUPPORT_HARD_LINKS
1178         if (preserve_hard_links && flist && flist->prev) {
1179                 if (protocol_version >= 28
1180                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1181                  : S_ISREG(st.st_mode)) {
1182                         tmp_dev = st.st_dev;
1183                         tmp_ino = st.st_ino;
1184                 } else
1185                         tmp_dev = 0;
1186         }
1187 #endif
1188
1189 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1190         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1191                 tmp_rdev = st.st_rdev;
1192                 st.st_size = 0;
1193         }
1194 #endif
1195
1196         file->flags = flags;
1197         file->modtime = st.st_mtime;
1198         file->len32 = (uint32)st.st_size;
1199         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1200                 file->flags |= FLAG_LENGTH64;
1201                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1202         }
1203         file->mode = st.st_mode;
1204         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1205                 F_OWNER(file) = st.st_uid;
1206         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1207                 F_GROUP(file) = st.st_gid;
1208
1209         if (basename != thisname)
1210                 file->dirname = lastdir;
1211
1212 #ifdef SUPPORT_LINKS
1213         if (linkname_len) {
1214                 bp = (char*)file->basename + basename_len;
1215                 memcpy(bp, linkname, linkname_len);
1216         }
1217 #endif
1218
1219         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1220                 file_checksum(thisname, tmp_sum, st.st_size);
1221
1222         F_PATHNAME(file) = pathname;
1223
1224         /* This code is only used by the receiver when it is building
1225          * a list of files for a delete pass. */
1226         if (keep_dirlinks && linkname_len && flist) {
1227                 STRUCT_STAT st2;
1228                 int save_mode = file->mode;
1229                 file->mode = S_IFDIR; /* Find a directory with our name. */
1230                 if (flist_find(dir_flist, file) >= 0
1231                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1232                         file->modtime = st2.st_mtime;
1233                         file->len32 = 0;
1234                         file->mode = st2.st_mode;
1235                         if (uid_ndx)
1236                                 F_OWNER(file) = st2.st_uid;
1237                         if (gid_ndx)
1238                                 F_GROUP(file) = st2.st_gid;
1239                 } else
1240                         file->mode = save_mode;
1241         }
1242
1243         if (basename_len == 0+1) {
1244                 if (!pool)
1245                         unmake_file(file);
1246                 return NULL;
1247         }
1248
1249         if (unsort_ndx)
1250                 F_NDX(file) = dir_count;
1251
1252         return file;
1253 }
1254
1255 /* Only called for temporary file_struct entries created by make_file(). */
1256 void unmake_file(struct file_struct *file)
1257 {
1258         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1259 #if EXTRA_ROUNDING > 0
1260         if (extra_cnt & EXTRA_ROUNDING)
1261                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1262 #endif
1263         free(REQ_EXTRA(file, extra_cnt));
1264 }
1265
1266 static struct file_struct *send_file_name(int f, struct file_list *flist,
1267                                           char *fname, STRUCT_STAT *stp,
1268                                           int flags, int filter_level)
1269 {
1270         struct file_struct *file;
1271 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1272         stat_x sx;
1273 #endif
1274
1275         file = make_file(fname, flist, stp, flags, filter_level);
1276         if (!file)
1277                 return NULL;
1278
1279         if (chmod_modes && !S_ISLNK(file->mode))
1280                 file->mode = tweak_mode(file->mode, chmod_modes);
1281
1282 #ifdef SUPPORT_ACLS
1283         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1284                 sx.st.st_mode = file->mode;
1285                 sx.acc_acl = sx.def_acl = NULL;
1286                 if (get_acl(fname, &sx) < 0)
1287                         return NULL;
1288         }
1289 #endif
1290 #ifdef SUPPORT_XATTRS
1291         if (preserve_xattrs && f >= 0) {
1292                 sx.xattr = NULL;
1293                 if (get_xattr(fname, &sx) < 0)
1294                         return NULL;
1295         }
1296 #endif
1297
1298         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1299
1300         flist_expand(flist, 1);
1301         flist->files[flist->used++] = file;
1302         if (f >= 0) {
1303                 send_file_entry(f, file, flist->used - 1, flist->ndx_start);
1304 #ifdef SUPPORT_ACLS
1305                 if (preserve_acls && !S_ISLNK(file->mode)) {
1306                         send_acl(&sx, f);
1307                         free_acl(&sx);
1308                 }
1309 #endif
1310 #ifdef SUPPORT_XATTRS
1311                 if (preserve_xattrs) {
1312                         F_XATTR(file) = send_xattr(&sx, f);
1313                         free_xattr(&sx);
1314                 }
1315 #endif
1316         }
1317         return file;
1318 }
1319
1320 static void send_if_directory(int f, struct file_list *flist,
1321                               struct file_struct *file,
1322                               char *fbuf, unsigned int ol,
1323                               int flags)
1324 {
1325         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1326
1327         if (S_ISDIR(file->mode)
1328             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1329                 void *save_filters;
1330                 unsigned int len = strlen(fbuf);
1331                 if (len > 1 && fbuf[len-1] == '/')
1332                         fbuf[--len] = '\0';
1333                 if (len >= MAXPATHLEN - 1) {
1334                         io_error |= IOERR_GENERAL;
1335                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1336                                 full_fname(fbuf));
1337                         return;
1338                 }
1339                 save_filters = push_local_filters(fbuf, len);
1340                 send_directory(f, flist, fbuf, len, flags);
1341                 pop_local_filters(save_filters);
1342                 fbuf[ol] = '\0';
1343                 if (is_dot_dir)
1344                         fbuf[ol-1] = '.';
1345         }
1346 }
1347
1348 static int file_compare(const void *file1, const void *file2)
1349 {
1350         return f_name_cmp(*(struct file_struct **)file1,
1351                           *(struct file_struct **)file2);
1352 }
1353
1354 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1355  * version, but I (Wayne) changed the merge code to do less copying and
1356  * to require only half the amount of temporary memory. */
1357 static void fsort_tmp(struct file_struct **fp, size_t num,
1358                       struct file_struct **tmp)
1359 {
1360         struct file_struct **f1, **f2, **t;
1361         size_t n1, n2;
1362
1363         n1 = num / 2;
1364         n2 = num - n1;
1365         f1 = fp;
1366         f2 = fp + n1;
1367
1368         if (n1 > 1)
1369                 fsort_tmp(f1, n1, tmp);
1370         if (n2 > 1)
1371                 fsort_tmp(f2, n2, tmp);
1372
1373         while (f_name_cmp(*f1, *f2) <= 0) {
1374                 if (!--n1)
1375                         return;
1376                 f1++;
1377         }
1378
1379         t = tmp;
1380         memcpy(t, f1, n1 * PTR_SIZE);
1381
1382         *f1++ = *f2++, n2--;
1383
1384         while (n1 > 0 && n2 > 0) {
1385                 if (f_name_cmp(*t, *f2) <= 0)
1386                         *f1++ = *t++, n1--;
1387                 else
1388                         *f1++ = *f2++, n2--;
1389         }
1390
1391         if (n1 > 0)
1392                 memcpy(f1, t, n1 * PTR_SIZE);
1393 }
1394
1395 /* This file-struct sorting routine makes sure that any identical names in
1396  * the file list stay in the same order as they were in the original list.
1397  * This is particularly vital in inc_recurse mode where we expect a sort
1398  * on the flist to match the exact order of a sort on the dir_flist. */
1399 static void fsort(struct file_struct **fp, size_t num)
1400 {
1401         if (num <= 1)
1402                 return;
1403
1404         if (use_qsort)
1405                 qsort(fp, num, PTR_SIZE, file_compare);
1406         else {
1407                 struct file_struct **tmp = new_array(struct file_struct *,
1408                                                      (num+1) / 2);
1409                 fsort_tmp(fp, num, tmp);
1410                 free(tmp);
1411         }
1412 }
1413
1414 /* We take an entire set of sibling dirs from the sorted flist and link them
1415  * into the tree, setting the appropriate parent/child/sibling pointers. */
1416 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1417                              int dir_cnt)
1418 {
1419         int i;
1420         int32 *dp = NULL;
1421         int32 *parent_dp = parent_ndx < 0 ? NULL
1422                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1423
1424         flist_expand(dir_flist, dir_cnt);
1425         dir_flist->sorted = dir_flist->files;
1426
1427         for (i = 0; dir_cnt; i++) {
1428                 struct file_struct *file = from_flist->sorted[i];
1429
1430                 if (!S_ISDIR(file->mode))
1431                         continue;
1432
1433                 dir_flist->files[dir_flist->used++] = file;
1434                 dir_cnt--;
1435
1436                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1437                         continue;
1438
1439                 if (dp)
1440                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1441                 else if (parent_dp)
1442                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1443                 else
1444                         send_dir_ndx = dir_flist->used - 1;
1445
1446                 dp = F_DIR_NODE_P(file);
1447                 DIR_PARENT(dp) = parent_ndx;
1448                 DIR_FIRST_CHILD(dp) = -1;
1449         }
1450         if (dp)
1451                 DIR_NEXT_SIBLING(dp) = -1;
1452 }
1453
1454 /* This function is normally called by the sender, but the receiving side also
1455  * calls it from get_dirlist() with f set to -1 so that we just construct the
1456  * file list in memory without sending it over the wire.  Also, get_dirlist()
1457  * might call this with f set to -2, which also indicates that local filter
1458  * rules should be ignored. */
1459 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1460                            int flags)
1461 {
1462         struct dirent *di;
1463         unsigned remainder;
1464         char *p;
1465         DIR *d;
1466         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1467         int start = flist->used;
1468         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1469
1470         assert(flist != NULL);
1471
1472         if (!(d = opendir(fbuf))) {
1473                 io_error |= IOERR_GENERAL;
1474                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1475                 return;
1476         }
1477
1478         p = fbuf + len;
1479         if (len != 1 || *fbuf != '/')
1480                 *p++ = '/';
1481         *p = '\0';
1482         remainder = MAXPATHLEN - (p - fbuf);
1483
1484         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1485                 char *dname = d_name(di);
1486                 if (dname[0] == '.' && (dname[1] == '\0'
1487                     || (dname[1] == '.' && dname[2] == '\0')))
1488                         continue;
1489                 if (strlcpy(p, dname, remainder) >= remainder) {
1490                         io_error |= IOERR_GENERAL;
1491                         rprintf(FINFO,
1492                                 "cannot send long-named file %s\n",
1493                                 full_fname(fbuf));
1494                         continue;
1495                 }
1496                 if (dname[0] == '\0') {
1497                         io_error |= IOERR_GENERAL;
1498                         rprintf(FINFO,
1499                                 "cannot send file with empty name in %s\n",
1500                                 full_fname(fbuf));
1501                         continue;
1502                 }
1503
1504                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1505         }
1506
1507         fbuf[len] = '\0';
1508
1509         if (errno) {
1510                 io_error |= IOERR_GENERAL;
1511                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1512         }
1513
1514         closedir(d);
1515
1516         if (f >= 0 && recurse && !divert_dirs) {
1517                 int i, end = flist->used - 1;
1518                 /* send_if_directory() bumps flist->used, so use "end". */
1519                 for (i = start; i <= end; i++)
1520                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1521         }
1522 }
1523
1524 static char lastpath[MAXPATHLEN] = "";
1525 static int lastpath_len = 0;
1526 static struct file_struct *lastpath_struct;
1527
1528 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1529                               char *start, char *limit, int flags, char name_type)
1530 {
1531         struct file_struct *file;
1532         item_list *relname_list;
1533         relnamecache **rnpp;
1534         char *slash;
1535         int len, need_new_dir;
1536         struct filter_list_struct save_filter_list = filter_list;
1537
1538         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1539         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1540
1541         if (inc_recurse) {
1542                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1543                  && lastpath_len == limit - fname
1544                  && strncmp(lastpath, fname, lastpath_len) == 0)
1545                         need_new_dir = 0;
1546                 else
1547                         need_new_dir = 1;
1548         } else
1549                 need_new_dir = 1;
1550
1551         if (need_new_dir) {
1552                 int save_copy_links = copy_links;
1553                 int save_xfer_dirs = xfer_dirs;
1554
1555                 copy_links = xfer_dirs = 1;
1556
1557                 *limit = '\0';
1558
1559                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1560                         *slash = '\0';
1561                         send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1562                         *slash = '/';
1563                 }
1564
1565                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1566                 if (inc_recurse) {
1567                         if (file && !S_ISDIR(file->mode))
1568                                 file = NULL;
1569                         lastpath_struct = file;
1570                 }
1571
1572                 strlcpy(lastpath, fname, sizeof lastpath);
1573                 lastpath_len = limit - fname;
1574
1575                 *limit = '/';
1576
1577                 copy_links = save_copy_links;
1578                 xfer_dirs = save_xfer_dirs;
1579
1580                 if (!inc_recurse)
1581                         goto done;
1582         }
1583
1584         if (!lastpath_struct)
1585                 goto done; /* dir must have vanished */
1586
1587         len = strlen(limit+1);
1588         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1589         if (!relname_list) {
1590                 if (!(relname_list = new0(item_list)))
1591                         out_of_memory("send_implied_dirs");
1592                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1593         }
1594         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1595         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1596                 out_of_memory("send_implied_dirs");
1597         (*rnpp)->name_type = name_type;
1598         strlcpy((*rnpp)->fname, limit+1, len + 1);
1599
1600 done:
1601         filter_list = save_filter_list;
1602 }
1603
1604 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1605 {
1606         char fbuf[MAXPATHLEN];
1607         item_list *relname_list;
1608         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1609         size_t j;
1610
1611         f_name(file, fbuf);
1612         dlen = strlen(fbuf);
1613
1614         if (F_PATHNAME(file) != pathname) {
1615                 if (!push_pathname(F_PATHNAME(file), -1))
1616                         exit_cleanup(RERR_FILESELECT);
1617         }
1618
1619         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1620
1621         if (file->flags & FLAG_CONTENT_DIR) {
1622                 if (one_file_system) {
1623                         STRUCT_STAT st;
1624                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1625                                 io_error |= IOERR_GENERAL;
1626                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1627                                         full_fname(fbuf));
1628                                 return;
1629                         }
1630                         filesystem_dev = st.st_dev;
1631                 }
1632                 send_directory(f, flist, fbuf, dlen, flags);
1633         }
1634
1635         if (!relative_paths)
1636                 return;
1637
1638         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1639         if (!relname_list)
1640                 return;
1641
1642         for (j = 0; j < relname_list->count; j++) {
1643                 char *slash;
1644                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1645                 char name_type = rnp->name_type;
1646
1647                 fbuf[dlen] = '/';
1648                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1649                 free(rnp);
1650                 if (len >= (int)sizeof fbuf)
1651                         continue; /* Impossible... */
1652
1653                 slash = strchr(fbuf+dlen+1, '/');
1654                 if (slash) {
1655                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1656                         continue;
1657                 }
1658
1659                 if (name_type != NORMAL_NAME) {
1660                         STRUCT_STAT st;
1661                         if (link_stat(fbuf, &st, 1) != 0) {
1662                                 io_error |= IOERR_GENERAL;
1663                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1664                                         full_fname(fbuf));
1665                                 continue;
1666                         }
1667                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1668                 } else
1669                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1670         }
1671
1672         free(relname_list);
1673 }
1674
1675 void send_extra_file_list(int f, int at_least)
1676 {
1677         struct file_list *flist;
1678         int64 start_write;
1679         uint16 prev_flags;
1680         int old_cnt, save_io_error = io_error;
1681
1682         if (flist_eof)
1683                 return;
1684
1685         /* Keep sending data until we have the requested number of
1686          * files in the upcoming file-lists. */
1687         old_cnt = cur_flist->used;
1688         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1689                 old_cnt += flist->used;
1690         while (file_total - old_cnt < at_least) {
1691                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1692                 int dir_ndx, dstart = dir_count;
1693                 const char *pathname = F_PATHNAME(file);
1694                 int32 *dp;
1695
1696                 flist = flist_new(0, "send_extra_file_list");
1697                 start_write = stats.total_written;
1698
1699                 if (unsort_ndx)
1700                         dir_ndx = F_NDX(file);
1701                 else
1702                         dir_ndx = send_dir_ndx;
1703                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1704                 flist->parent_ndx = dir_ndx;
1705
1706                 send1extra(f, file, flist);
1707                 prev_flags = file->flags;
1708                 dp = F_DIR_NODE_P(file);
1709
1710                 /* If there are any duplicate directory names that follow, we
1711                  * send all the dirs together in one file-list.  The dir_flist
1712                  * tree links all the child subdirs onto the last dup dir. */
1713                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1714                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1715                         send_dir_ndx = dir_ndx;
1716                         file = dir_flist->sorted[dir_ndx];
1717                         /* Try to avoid some duplicate scanning of identical dirs. */
1718                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1719                                 file->flags &= ~FLAG_CONTENT_DIR;
1720                         send1extra(f, file, flist);
1721                         prev_flags = file->flags;
1722                         dp = F_DIR_NODE_P(file);
1723                 }
1724
1725                 write_byte(f, 0);
1726
1727                 if (need_unsorted_flist) {
1728                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1729                                 out_of_memory("send_extra_file_list");
1730                         memcpy(flist->sorted, flist->files,
1731                                flist->used * sizeof (struct file_struct*));
1732                 } else
1733                         flist->sorted = flist->files;
1734
1735                 flist_sort_and_clean(flist, 0);
1736
1737                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1738                 flist_done_allocating(flist);
1739
1740                 file_total += flist->used;
1741                 stats.flist_size += stats.total_written - start_write;
1742                 stats.num_files += flist->used;
1743                 if (verbose > 3)
1744                         output_flist(flist);
1745
1746                 if (DIR_FIRST_CHILD(dp) >= 0) {
1747                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1748                         send_dir_depth++;
1749                 } else {
1750                         while (DIR_NEXT_SIBLING(dp) < 0) {
1751                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1752                                         write_ndx(f, NDX_FLIST_EOF);
1753                                         flist_eof = 1;
1754                                         change_local_filter_dir(NULL, 0, 0);
1755                                         goto finish;
1756                                 }
1757                                 send_dir_depth--;
1758                                 file = dir_flist->sorted[send_dir_ndx];
1759                                 dp = F_DIR_NODE_P(file);
1760                         }
1761                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1762                 }
1763         }
1764
1765   finish:
1766         if (io_error != save_io_error && !ignore_errors)
1767                 send_msg_int(MSG_IO_ERROR, io_error);
1768 }
1769
1770 struct file_list *send_file_list(int f, int argc, char *argv[])
1771 {
1772         static const char *lastdir;
1773         static int lastdir_len = -1;
1774         int len, dirlen;
1775         STRUCT_STAT st;
1776         char *p, *dir;
1777         struct file_list *flist;
1778         struct timeval start_tv, end_tv;
1779         int64 start_write;
1780         int use_ff_fd = 0;
1781         int disable_buffering;
1782         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1783         int reading_remotely = filesfrom_host != NULL;
1784         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1785 #ifdef ICONV_OPTION
1786                      | (filesfrom_convert ? RL_CONVERT : 0)
1787 #endif
1788                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1789
1790         rprintf(FLOG, "building file list\n");
1791         if (show_filelist_p())
1792                 start_filelist_progress("building file list");
1793         else if (inc_recurse && verbose && !am_server)
1794                 rprintf(FCLIENT, "sending incremental file list\n");
1795
1796         start_write = stats.total_written;
1797         gettimeofday(&start_tv, NULL);
1798
1799         if (relative_paths && protocol_version >= 30)
1800                 implied_dirs = 1; /* We send flagged implied dirs */
1801
1802 #ifdef SUPPORT_HARD_LINKS
1803         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1804                 init_hard_links();
1805 #endif
1806
1807         flist = cur_flist = flist_new(0, "send_file_list");
1808         if (inc_recurse) {
1809                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1810                 flags |= FLAG_DIVERT_DIRS;
1811         } else
1812                 dir_flist = cur_flist;
1813
1814         disable_buffering = io_start_buffering_out(f);
1815         if (filesfrom_fd >= 0) {
1816                 if (argv[0] && !push_dir(argv[0], 0)) {
1817                         rsyserr(FERROR_XFER, errno, "push_dir %s failed in %s",
1818                                 full_fname(argv[0]), curr_dir);
1819                         exit_cleanup(RERR_FILESELECT);
1820                 }
1821                 use_ff_fd = 1;
1822         }
1823
1824         while (1) {
1825                 char fbuf[MAXPATHLEN], *fn, name_type;
1826
1827                 if (use_ff_fd) {
1828                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1829                                 break;
1830                         sanitize_path(fbuf, fbuf, "", 0);
1831                 } else {
1832                         if (argc-- == 0)
1833                                 break;
1834                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1835                         if (sanitize_paths)
1836                                 sanitize_path(fbuf, fbuf, "", 0);
1837                 }
1838
1839                 len = strlen(fbuf);
1840                 if (relative_paths) {
1841                         /* We clean up fbuf below. */
1842                         name_type = NORMAL_NAME;
1843                 } else if (!len || fbuf[len - 1] == '/') {
1844                         if (len == 2 && fbuf[0] == '.') {
1845                                 /* Turn "./" into just "." rather than "./." */
1846                                 fbuf[--len] = '\0';
1847                         } else {
1848                                 if (len + 1 >= MAXPATHLEN)
1849                                         overflow_exit("send_file_list");
1850                                 fbuf[len++] = '.';
1851                                 fbuf[len] = '\0';
1852                         }
1853                         name_type = DOT_NAME;
1854                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1855                     && (len == 2 || fbuf[len-3] == '/')) {
1856                         if (len + 2 >= MAXPATHLEN)
1857                                 overflow_exit("send_file_list");
1858                         fbuf[len++] = '/';
1859                         fbuf[len++] = '.';
1860                         fbuf[len] = '\0';
1861                         name_type = DOT_NAME;
1862                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1863                         name_type = DOT_NAME;
1864                 else
1865                         name_type = NORMAL_NAME;
1866
1867                 dir = NULL;
1868
1869                 if (!relative_paths) {
1870                         p = strrchr(fbuf, '/');
1871                         if (p) {
1872                                 *p = '\0';
1873                                 if (p == fbuf)
1874                                         dir = "/";
1875                                 else
1876                                         dir = fbuf;
1877                                 len -= p - fbuf + 1;
1878                                 fn = p + 1;
1879                         } else
1880                                 fn = fbuf;
1881                 } else {
1882                         if ((p = strstr(fbuf, "/./")) != NULL) {
1883                                 *p = '\0';
1884                                 if (p == fbuf)
1885                                         dir = "/";
1886                                 else
1887                                         dir = fbuf;
1888                                 fn = p + 3;
1889                                 while (*fn == '/')
1890                                         fn++;
1891                                 if (!*fn)
1892                                         *--fn = '\0'; /* ensure room for '.' */
1893                         } else
1894                                 fn = fbuf;
1895                         len = clean_fname(fn, CFN_KEEP_LEADING_DOT_DIR
1896                                             | CFN_KEEP_TRAILING_SLASH
1897                                             | CFN_DROP_TRAILING_DOT_DIR);
1898                         if (len == 1) {
1899                                 if (fn[0] == '/') {
1900                                         fn = "/.";
1901                                         len = 2;
1902                                         name_type = DOT_NAME;
1903                                 } else if (fn[0] == '.')
1904                                         name_type = DOT_NAME;
1905                         } else if (fn[len-1] == '/') {
1906                                 fn[--len] = '\0';
1907                                 if (len == 1 && *fn == '.')
1908                                         name_type = DOT_NAME;
1909                                 else
1910                                         name_type = SLASH_ENDING_NAME;
1911                         }
1912                         /* Reject a ".." dir in the active part of the path. */
1913                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1914                                 if ((p[2] == '/' || p[2] == '\0')
1915                                  && (p == fn || p[-1] == '/')) {
1916                                         rprintf(FERROR,
1917                                             "found \"..\" dir in relative path: %s\n",
1918                                             fn);
1919                                         exit_cleanup(RERR_SYNTAX);
1920                                 }
1921                         }
1922                 }
1923
1924                 if (!*fn) {
1925                         len = 1;
1926                         fn = ".";
1927                         name_type = DOT_NAME;
1928                 }
1929
1930                 dirlen = dir ? strlen(dir) : 0;
1931                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1932                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1933                                 continue;
1934                         lastdir = pathname;
1935                         lastdir_len = pathname_len;
1936                 } else if (!push_pathname(lastdir, lastdir_len))
1937                         continue;
1938
1939                 if (fn != fbuf)
1940                         memmove(fbuf, fn, len + 1);
1941
1942                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0) {
1943                         io_error |= IOERR_GENERAL;
1944                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1945                                 full_fname(fbuf));
1946                         continue;
1947                 }
1948
1949                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1950                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1951                         continue;
1952                 }
1953
1954                 if (inc_recurse && relative_paths && *fbuf) {
1955                         if ((p = strchr(fbuf+1, '/')) != NULL) {
1956                                 if (p - fbuf == 1 && *fbuf == '.') {
1957                                         if ((fn = strchr(p+1, '/')) != NULL)
1958                                                 p = fn;
1959                                 } else
1960                                         fn = p;
1961                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
1962                                 if (fn == p)
1963                                         continue;
1964                         }
1965                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1966                         /* Send the implied directories at the start of the
1967                          * source spec, so we get their permissions right. */
1968                         char *lp = lastpath, *slash = fbuf;
1969                         *p = '\0';
1970                         /* Skip any initial directories in our path that we
1971                          * have in common with lastpath. */
1972                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1973                                 if (*fn == '/')
1974                                         slash = fn;
1975                         }
1976                         *p = '/';
1977                         if (fn != p || (*lp && *lp != '/'))
1978                                 send_implied_dirs(f, flist, fbuf, slash, p, flags, 0);
1979                 }
1980
1981                 if (one_file_system)
1982                         filesystem_dev = st.st_dev;
1983
1984                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
1985                         struct file_struct *file;
1986                         int top_flags = FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags;
1987                         file = send_file_name(f, flist, fbuf, &st,
1988                                               top_flags, ALL_FILTERS);
1989                         if (inc_recurse) {
1990                                 if (name_type == DOT_NAME && file) {
1991                                         if (send_dir_depth < 0) {
1992                                                 send_dir_depth = 0;
1993                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
1994                                         }
1995                                         send_directory(f, flist, fbuf, len, flags);
1996                                 }
1997                         } else if (file)
1998                                 send_if_directory(f, flist, file, fbuf, len, flags);
1999                 } else
2000                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
2001         }
2002
2003         gettimeofday(&end_tv, NULL);
2004         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2005                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2006         if (stats.flist_buildtime == 0)
2007                 stats.flist_buildtime = 1;
2008         start_tv = end_tv;
2009
2010         write_byte(f, 0); /* Indicate end of file list */
2011
2012 #ifdef SUPPORT_HARD_LINKS
2013         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2014                 idev_destroy();
2015 #endif
2016
2017         if (show_filelist_p())
2018                 finish_filelist_progress(flist);
2019
2020         gettimeofday(&end_tv, NULL);
2021         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2022                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2023
2024         /* When converting names, both sides keep an unsorted file-list array
2025          * because the names will differ on the sending and receiving sides
2026          * (both sides will use the unsorted index number for each item). */
2027
2028         /* Sort the list without removing any duplicates.  This allows the
2029          * receiving side to ask for whatever name it kept.  For incremental
2030          * recursion mode, the sender marks duplicate dirs so that it can
2031          * send them together in a single file-list. */
2032         if (need_unsorted_flist) {
2033                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2034                         out_of_memory("send_file_list");
2035                 memcpy(flist->sorted, flist->files,
2036                        flist->used * sizeof (struct file_struct*));
2037         } else
2038                 flist->sorted = flist->files;
2039         flist_sort_and_clean(flist, 0);
2040         file_total += flist->used;
2041
2042         if (numeric_ids <= 0 && !inc_recurse)
2043                 send_id_list(f);
2044
2045         /* send the io_error flag */
2046         if (protocol_version < 30)
2047                 write_int(f, ignore_errors ? 0 : io_error);
2048         else if (io_error && !ignore_errors)
2049                 send_msg_int(MSG_IO_ERROR, io_error);
2050
2051         if (disable_buffering)
2052                 io_end_buffering_out();
2053
2054         stats.flist_size = stats.total_written - start_write;
2055         stats.num_files = flist->used;
2056
2057         if (verbose > 3)
2058                 output_flist(flist);
2059
2060         if (verbose > 2)
2061                 rprintf(FINFO, "send_file_list done\n");
2062
2063         if (inc_recurse) {
2064                 send_dir_depth = 1;
2065                 add_dirs_to_tree(-1, flist, dir_count);
2066                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0) 
2067                         flist->parent_ndx = -1;
2068                 flist_done_allocating(flist);
2069                 if (send_dir_ndx < 0) {
2070                         write_ndx(f, NDX_FLIST_EOF);
2071                         flist_eof = 1;
2072                 }
2073                 else if (file_total == 1) {
2074                         /* If we're creating incremental file-lists and there
2075                          * was just 1 item in the first file-list, send 1 more
2076                          * file-list to check if this is a 1-file xfer. */
2077                         send_extra_file_list(f, 1);
2078                 }
2079         }
2080
2081         return flist;
2082 }
2083
2084 struct file_list *recv_file_list(int f)
2085 {
2086         struct file_list *flist;
2087         int dstart, flags;
2088         int64 start_read;
2089
2090         if (!first_flist)
2091                 rprintf(FLOG, "receiving file list\n");
2092         if (show_filelist_p())
2093                 start_filelist_progress("receiving file list");
2094         else if (inc_recurse && verbose && !am_server && !first_flist)
2095                 rprintf(FCLIENT, "receiving incremental file list\n");
2096
2097         start_read = stats.total_read;
2098
2099 #ifdef SUPPORT_HARD_LINKS
2100         if (preserve_hard_links && !first_flist)
2101                 init_hard_links();
2102 #endif
2103
2104         flist = flist_new(0, "recv_file_list");
2105
2106         if (inc_recurse) {
2107                 if (flist->ndx_start == 1)
2108                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2109                 dstart = dir_flist->used;
2110         } else {
2111                 dir_flist = flist;
2112                 dstart = 0;
2113         }
2114
2115         while ((flags = read_byte(f)) != 0) {
2116                 struct file_struct *file;
2117
2118                 flist_expand(flist, 1);
2119
2120                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2121                         flags |= read_byte(f) << 8;
2122                 file = recv_file_entry(flist, flags, f);
2123
2124                 if (inc_recurse && S_ISDIR(file->mode)) {
2125                         flist_expand(dir_flist, 1);
2126                         dir_flist->files[dir_flist->used++] = file;
2127                 }
2128
2129                 flist->files[flist->used++] = file;
2130
2131                 maybe_emit_filelist_progress(flist->used);
2132
2133                 if (verbose > 2) {
2134                         rprintf(FINFO, "recv_file_name(%s)\n",
2135                                 f_name(file, NULL));
2136                 }
2137         }
2138         file_total += flist->used;
2139
2140         if (verbose > 2)
2141                 rprintf(FINFO, "received %d names\n", flist->used);
2142
2143         if (show_filelist_p())
2144                 finish_filelist_progress(flist);
2145
2146         if (need_unsorted_flist) {
2147                 /* Create an extra array of index pointers that we can sort for
2148                  * the generator's use (for wading through the files in sorted
2149                  * order and for calling flist_find()).  We keep the "files"
2150                  * list unsorted for our exchange of index numbers with the
2151                  * other side (since their names may not sort the same). */
2152                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2153                         out_of_memory("recv_file_list");
2154                 memcpy(flist->sorted, flist->files,
2155                        flist->used * sizeof (struct file_struct*));
2156                 if (inc_recurse && dir_flist->used > dstart) {
2157                         static int dir_flist_malloced = 0;
2158                         if (dir_flist_malloced < dir_flist->malloced) {
2159                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2160                                                         struct file_struct *,
2161                                                         dir_flist->malloced);
2162                                 dir_flist_malloced = dir_flist->malloced;
2163                         }
2164                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2165                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2166                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2167                 }
2168         } else {
2169                 flist->sorted = flist->files;
2170                 if (inc_recurse && dir_flist->used > dstart) {
2171                         dir_flist->sorted = dir_flist->files;
2172                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2173                 }
2174         }
2175
2176         if (inc_recurse)
2177                 flist_done_allocating(flist);
2178         else if (f >= 0)
2179                 recv_id_list(f, flist);
2180
2181         flist_sort_and_clean(flist, relative_paths);
2182
2183         if (protocol_version < 30) {
2184                 /* Recv the io_error flag */
2185                 if (ignore_errors)
2186                         read_int(f);
2187                 else
2188                         io_error |= read_int(f);
2189         } else if (inc_recurse && flist->ndx_start == 1) {
2190                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0) 
2191                         flist->parent_ndx = -1;
2192         }
2193
2194         if (verbose > 3)
2195                 output_flist(flist);
2196
2197         if (verbose > 2)
2198                 rprintf(FINFO, "recv_file_list done\n");
2199
2200         stats.flist_size += stats.total_read - start_read;
2201         stats.num_files += flist->used;
2202
2203         return flist;
2204 }
2205
2206 /* This is only used once by the receiver if the very first file-list
2207  * has exactly one item in it. */
2208 void recv_additional_file_list(int f)
2209 {
2210         struct file_list *flist;
2211         int ndx = read_ndx(f);
2212         if (ndx == NDX_FLIST_EOF) {
2213                 flist_eof = 1;
2214                 change_local_filter_dir(NULL, 0, 0);
2215         } else {
2216                 ndx = NDX_FLIST_OFFSET - ndx;
2217                 if (ndx < 0 || ndx >= dir_flist->used) {
2218                         ndx = NDX_FLIST_OFFSET - ndx;
2219                         rprintf(FERROR,
2220                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2221                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2222                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2223                         exit_cleanup(RERR_PROTOCOL);
2224                 }
2225                 if (verbose > 3) {
2226                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2227                                 who_am_i(), ndx);
2228                 }
2229                 flist = recv_file_list(f);
2230                 flist->parent_ndx = ndx;
2231         }
2232 }
2233
2234 /* Search for an identically-named item in the file list.  Note that the
2235  * items must agree in their directory-ness, or no match is returned. */
2236 int flist_find(struct file_list *flist, struct file_struct *f)
2237 {
2238         int low = flist->low, high = flist->high;
2239         int diff, mid, mid_up;
2240
2241         while (low <= high) {
2242                 mid = (low + high) / 2;
2243                 if (F_IS_ACTIVE(flist->sorted[mid]))
2244                         mid_up = mid;
2245                 else {
2246                         /* Scan for the next non-empty entry using the cached
2247                          * distance values.  If the value isn't fully up-to-
2248                          * date, update it. */
2249                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2250                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2251                                 do {
2252                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2253                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2254                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2255                         }
2256                         if (mid_up > high) {
2257                                 /* If there's nothing left above us, set high to
2258                                  * a non-empty entry below us and continue. */
2259                                 high = mid - (int)flist->sorted[mid]->len32;
2260                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2261                                         do {
2262                                             high -= (int)flist->sorted[high]->len32;
2263                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2264                                         flist->sorted[mid]->len32 = mid - high;
2265                                 }
2266                                 continue;
2267                         }
2268                 }
2269                 diff = f_name_cmp(flist->sorted[mid_up], f);
2270                 if (diff == 0) {
2271                         if (protocol_version < 29
2272                             && S_ISDIR(flist->sorted[mid_up]->mode)
2273                             != S_ISDIR(f->mode))
2274                                 return -1;
2275                         return mid_up;
2276                 }
2277                 if (diff < 0)
2278                         low = mid_up + 1;
2279                 else
2280                         high = mid - 1;
2281         }
2282         return -1;
2283 }
2284
2285 /*
2286  * Free up any resources a file_struct has allocated
2287  * and clear the file.
2288  */
2289 void clear_file(struct file_struct *file)
2290 {
2291         /* The +1 zeros out the first char of the basename. */
2292         memset(file, 0, FILE_STRUCT_LEN + 1);
2293         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2294          * entry.  Likewise for len32 in the opposite direction.  We assume
2295          * that we're alone for now since flist_find() will adjust the counts
2296          * it runs into that aren't up-to-date. */
2297         file->len32 = F_DEPTH(file) = 1;
2298 }
2299
2300 /* Allocate a new file list. */
2301 struct file_list *flist_new(int flags, char *msg)
2302 {
2303         struct file_list *flist;
2304
2305         if (!(flist = new0(struct file_list)))
2306                 out_of_memory(msg);
2307
2308         if (flags & FLIST_TEMP) {
2309                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2310                                                 out_of_memory, POOL_INTERN)))
2311                         out_of_memory(msg);
2312         } else {
2313                 /* This is a doubly linked list with prev looping back to
2314                  * the end of the list, but the last next pointer is NULL. */
2315                 if (!first_flist) {
2316                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2317                                                 out_of_memory, POOL_INTERN);
2318                         if (!flist->file_pool)
2319                                 out_of_memory(msg);
2320
2321                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2322
2323                         first_flist = cur_flist = flist->prev = flist;
2324                 } else {
2325                         struct file_list *prev = first_flist->prev;
2326
2327                         flist->file_pool = first_flist->file_pool;
2328
2329                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2330                         flist->flist_num = prev->flist_num + 1;
2331
2332                         flist->prev = prev;
2333                         prev->next = first_flist->prev = flist;
2334                 }
2335                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2336                 flist_cnt++;
2337         }
2338
2339         return flist;
2340 }
2341
2342 /* Free up all elements in a flist. */
2343 void flist_free(struct file_list *flist)
2344 {
2345         if (!flist->prev) {
2346                 /* Was FLIST_TEMP dir-list. */
2347         } else if (flist == flist->prev) {
2348                 first_flist = cur_flist = NULL;
2349                 file_total = 0;
2350                 flist_cnt = 0;
2351         } else {
2352                 if (flist == cur_flist)
2353                         cur_flist = flist->next;
2354                 if (flist == first_flist)
2355                         first_flist = first_flist->next;
2356                 else {
2357                         flist->prev->next = flist->next;
2358                         if (!flist->next)
2359                                 flist->next = first_flist;
2360                 }
2361                 flist->next->prev = flist->prev;
2362                 file_total -= flist->used;
2363                 flist_cnt--;
2364         }
2365
2366         if (!flist->prev || !flist_cnt)
2367                 pool_destroy(flist->file_pool);
2368         else
2369                 pool_free_old(flist->file_pool, flist->pool_boundary);
2370
2371         if (flist->sorted && flist->sorted != flist->files)
2372                 free(flist->sorted);
2373         free(flist->files);
2374         free(flist);
2375 }
2376
2377 /* This routine ensures we don't have any duplicate names in our file list.
2378  * duplicate names can cause corruption because of the pipelining. */
2379 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2380 {
2381         char fbuf[MAXPATHLEN];
2382         int i, prev_i;
2383
2384         if (!flist)
2385                 return;
2386         if (flist->used == 0) {
2387                 flist->high = -1;
2388                 flist->low = 0;
2389                 return;
2390         }
2391
2392         fsort(flist->sorted, flist->used);
2393
2394         if (!am_sender || inc_recurse) {
2395                 for (i = prev_i = 0; i < flist->used; i++) {
2396                         if (F_IS_ACTIVE(flist->sorted[i])) {
2397                                 prev_i = i;
2398                                 break;
2399                         }
2400                 }
2401                 flist->low = prev_i;
2402         } else {
2403                 i = prev_i = flist->used - 1;
2404                 flist->low = 0;
2405         }
2406
2407         while (++i < flist->used) {
2408                 int j;
2409                 struct file_struct *file = flist->sorted[i];
2410
2411                 if (!F_IS_ACTIVE(file))
2412                         continue;
2413                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2414                         j = prev_i;
2415                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2416                         int save_mode = file->mode;
2417                         /* Make sure that this directory doesn't duplicate a
2418                          * non-directory earlier in the list. */
2419                         flist->high = prev_i;
2420                         file->mode = S_IFREG;
2421                         j = flist_find(flist, file);
2422                         file->mode = save_mode;
2423                 } else
2424                         j = -1;
2425                 if (j >= 0) {
2426                         int keep, drop;
2427                         /* If one is a dir and the other is not, we want to
2428                          * keep the dir because it might have contents in the
2429                          * list.  Otherwise keep the first one. */
2430                         if (S_ISDIR(file->mode)) {
2431                                 struct file_struct *fp = flist->sorted[j];
2432                                 if (!S_ISDIR(fp->mode))
2433                                         keep = i, drop = j;
2434                                 else {
2435                                         if (am_sender)
2436                                                 file->flags |= FLAG_DUPLICATE;
2437                                         else { /* Make sure we merge our vital flags. */
2438                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2439                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2440                                         }
2441                                         keep = j, drop = i;
2442                                 }
2443                         } else
2444                                 keep = j, drop = i;
2445
2446                         if (!am_sender) {
2447                                 if (verbose > 1) {
2448                                         rprintf(FINFO,
2449                                             "removing duplicate name %s from file list (%d)\n",
2450                                             f_name(file, fbuf), drop + flist->ndx_start);
2451                                 }
2452                                 clear_file(flist->sorted[drop]);
2453                         }
2454
2455                         if (keep == i) {
2456                                 if (flist->low == drop) {
2457                                         for (j = drop + 1;
2458                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2459                                              j++) {}
2460                                         flist->low = j;
2461                                 }
2462                                 prev_i = i;
2463                         }
2464                 } else
2465                         prev_i = i;
2466         }
2467         flist->high = prev_i;
2468
2469         if (strip_root) {
2470                 /* We need to strip off the leading slashes for relative
2471                  * paths, but this must be done _after_ the sorting phase. */
2472                 for (i = flist->low; i <= flist->high; i++) {
2473                         struct file_struct *file = flist->sorted[i];
2474
2475                         if (!file->dirname)
2476                                 continue;
2477                         while (*file->dirname == '/')
2478                                 file->dirname++;
2479                         if (!*file->dirname)
2480                                 file->dirname = NULL;
2481                 }
2482         }
2483
2484         if (prune_empty_dirs && !am_sender) {
2485                 int j, prev_depth = 0;
2486
2487                 prev_i = 0; /* It's OK that this isn't really true. */
2488
2489                 for (i = flist->low; i <= flist->high; i++) {
2490                         struct file_struct *fp, *file = flist->sorted[i];
2491
2492                         /* This temporarily abuses the F_DEPTH() value for a
2493                          * directory that is in a chain that might get pruned.
2494                          * We restore the old value if it gets a reprieve. */
2495                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2496                                 /* Dump empty dirs when coming back down. */
2497                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2498                                         fp = flist->sorted[prev_i];
2499                                         if (F_DEPTH(fp) >= 0)
2500                                                 break;
2501                                         prev_i = -F_DEPTH(fp)-1;
2502                                         clear_file(fp);
2503                                 }
2504                                 prev_depth = F_DEPTH(file);
2505                                 if (is_excluded(f_name(file, fbuf), 1,
2506                                                        ALL_FILTERS)) {
2507                                         /* Keep dirs through this dir. */
2508                                         for (j = prev_depth-1; ; j--) {
2509                                                 fp = flist->sorted[prev_i];
2510                                                 if (F_DEPTH(fp) >= 0)
2511                                                         break;
2512                                                 prev_i = -F_DEPTH(fp)-1;
2513                                                 F_DEPTH(fp) = j;
2514                                         }
2515                                 } else
2516                                         F_DEPTH(file) = -prev_i-1;
2517                                 prev_i = i;
2518                         } else {
2519                                 /* Keep dirs through this non-dir. */
2520                                 for (j = prev_depth; ; j--) {
2521                                         fp = flist->sorted[prev_i];
2522                                         if (F_DEPTH(fp) >= 0)
2523                                                 break;
2524                                         prev_i = -F_DEPTH(fp)-1;
2525                                         F_DEPTH(fp) = j;
2526                                 }
2527                         }
2528                 }
2529                 /* Dump all remaining empty dirs. */
2530                 while (1) {
2531                         struct file_struct *fp = flist->sorted[prev_i];
2532                         if (F_DEPTH(fp) >= 0)
2533                                 break;
2534                         prev_i = -F_DEPTH(fp)-1;
2535                         clear_file(fp);
2536                 }
2537
2538                 for (i = flist->low; i <= flist->high; i++) {
2539                         if (F_IS_ACTIVE(flist->sorted[i]))
2540                                 break;
2541                 }
2542                 flist->low = i;
2543                 for (i = flist->high; i >= flist->low; i--) {
2544                         if (F_IS_ACTIVE(flist->sorted[i]))
2545                                 break;
2546                 }
2547                 flist->high = i;
2548         }
2549 }
2550
2551 static void output_flist(struct file_list *flist)
2552 {
2553         char uidbuf[16], gidbuf[16], depthbuf[16];
2554         struct file_struct *file;
2555         const char *root, *dir, *slash, *name, *trail;
2556         const char *who = who_am_i();
2557         int i;
2558
2559         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2560                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2561         for (i = 0; i < flist->used; i++) {
2562                 file = flist->files[i];
2563                 if ((am_root || am_sender) && uid_ndx) {
2564                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2565                                  F_OWNER(file));
2566                 } else
2567                         *uidbuf = '\0';
2568                 if (gid_ndx) {
2569                         static char parens[] = "(\0)\0\0\0";
2570                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2571                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2572                                  pp, F_GROUP(file), pp + 2);
2573                 } else
2574                         *gidbuf = '\0';
2575                 if (!am_sender)
2576                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2577                 if (F_IS_ACTIVE(file)) {
2578                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2579                         if ((dir = file->dirname) == NULL)
2580                                 dir = slash = "";
2581                         else
2582                                 slash = "/";
2583                         name = file->basename;
2584                         trail = S_ISDIR(file->mode) ? "/" : "";
2585                 } else
2586                         root = dir = slash = name = trail = "";
2587                 rprintf(FINFO,
2588                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2589                         who, i + flist->ndx_start,
2590                         root, dir, slash, name, trail,
2591                         (int)file->mode, (double)F_LENGTH(file),
2592                         uidbuf, gidbuf, file->flags);
2593         }
2594 }
2595
2596 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2597 enum fnc_type { t_PATH, t_ITEM };
2598
2599 static int found_prefix;
2600
2601 /* Compare the names of two file_struct entities, similar to how strcmp()
2602  * would do if it were operating on the joined strings.
2603  *
2604  * Some differences beginning with protocol_version 29: (1) directory names
2605  * are compared with an assumed trailing slash so that they compare in a
2606  * way that would cause them to sort immediately prior to any content they
2607  * may have; (2) a directory of any name compares after a non-directory of
2608  * any name at the same depth; (3) a directory with name "." compares prior
2609  * to anything else.  These changes mean that a directory and a non-dir
2610  * with the same name will not compare as equal (protocol_version >= 29).
2611  *
2612  * The dirname component can be an empty string, but the basename component
2613  * cannot (and never is in the current codebase).  The basename component
2614  * may be NULL (for a removed item), in which case it is considered to be
2615  * after any existing item. */
2616 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2617 {
2618         int dif;
2619         const uchar *c1, *c2;
2620         enum fnc_state state1, state2;
2621         enum fnc_type type1, type2;
2622         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2623
2624         if (!f1 || !F_IS_ACTIVE(f1)) {
2625                 if (!f2 || !F_IS_ACTIVE(f2))
2626                         return 0;
2627                 return -1;
2628         }
2629         if (!f2 || !F_IS_ACTIVE(f2))
2630                 return 1;
2631
2632         c1 = (uchar*)f1->dirname;
2633         c2 = (uchar*)f2->dirname;
2634         if (c1 == c2)
2635                 c1 = c2 = NULL;
2636         if (!c1) {
2637                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2638                 c1 = (const uchar*)f1->basename;
2639                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2640                         type1 = t_ITEM;
2641                         state1 = s_TRAILING;
2642                         c1 = (uchar*)"";
2643                 } else
2644                         state1 = s_BASE;
2645         } else {
2646                 type1 = t_path;
2647                 state1 = s_DIR;
2648         }
2649         if (!c2) {
2650                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2651                 c2 = (const uchar*)f2->basename;
2652                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2653                         type2 = t_ITEM;
2654                         state2 = s_TRAILING;
2655                         c2 = (uchar*)"";
2656                 } else
2657                         state2 = s_BASE;
2658         } else {
2659                 type2 = t_path;
2660                 state2 = s_DIR;
2661         }
2662
2663         if (type1 != type2)
2664                 return type1 == t_PATH ? 1 : -1;
2665
2666         do {
2667                 if (!*c1) {
2668                         switch (state1) {
2669                         case s_DIR:
2670                                 state1 = s_SLASH;
2671                                 c1 = (uchar*)"/";
2672                                 break;
2673                         case s_SLASH:
2674                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2675                                 c1 = (const uchar*)f1->basename;
2676                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2677                                         type1 = t_ITEM;
2678                                         state1 = s_TRAILING;
2679                                         c1 = (uchar*)"";
2680                                 } else
2681                                         state1 = s_BASE;
2682                                 break;
2683                         case s_BASE:
2684                                 state1 = s_TRAILING;
2685                                 if (type1 == t_PATH) {
2686                                         c1 = (uchar*)"/";
2687                                         break;
2688                                 }
2689                                 /* FALL THROUGH */
2690                         case s_TRAILING:
2691                                 type1 = t_ITEM;
2692                                 break;
2693                         }
2694                         if (*c2 && type1 != type2)
2695                                 return type1 == t_PATH ? 1 : -1;
2696                 }
2697                 if (!*c2) {
2698                         switch (state2) {
2699                         case s_DIR:
2700                                 state2 = s_SLASH;
2701                                 c2 = (uchar*)"/";
2702                                 break;
2703                         case s_SLASH:
2704                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2705                                 c2 = (const uchar*)f2->basename;
2706                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2707                                         type2 = t_ITEM;
2708                                         state2 = s_TRAILING;
2709                                         c2 = (uchar*)"";
2710                                 } else
2711                                         state2 = s_BASE;
2712                                 break;
2713                         case s_BASE:
2714                                 state2 = s_TRAILING;
2715                                 if (type2 == t_PATH) {
2716                                         c2 = (uchar*)"/";
2717                                         break;
2718                                 }
2719                                 /* FALL THROUGH */
2720                         case s_TRAILING:
2721                                 found_prefix = 1;
2722                                 if (!*c1)
2723                                         return 0;
2724                                 type2 = t_ITEM;
2725                                 break;
2726                         }
2727                         if (type1 != type2)
2728                                 return type1 == t_PATH ? 1 : -1;
2729                 }
2730         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2731
2732         return dif;
2733 }
2734
2735 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2736  * not match if f2's basename is not an exact match of a path element in f1.
2737  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2738 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2739 {
2740         found_prefix = 0;
2741         f_name_cmp(f1, f2);
2742         return found_prefix;
2743 }
2744
2745 char *f_name_buf(void)
2746 {
2747         static char names[5][MAXPATHLEN];
2748         static unsigned int n;
2749
2750         n = (n + 1) % (sizeof names / sizeof names[0]);
2751
2752         return names[n];
2753 }
2754
2755 /* Return a copy of the full filename of a flist entry, using the indicated
2756  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2757  * done because we checked the size when creating the file_struct entry.
2758  */
2759 char *f_name(const struct file_struct *f, char *fbuf)
2760 {
2761         if (!f || !F_IS_ACTIVE(f))
2762                 return NULL;
2763
2764         if (!fbuf)
2765                 fbuf = f_name_buf();
2766
2767         if (f->dirname) {
2768                 int len = strlen(f->dirname);
2769                 memcpy(fbuf, f->dirname, len);
2770                 fbuf[len] = '/';
2771                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2772         } else
2773                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2774
2775         return fbuf;
2776 }
2777
2778 /* Do a non-recursive scan of the named directory, possibly ignoring all
2779  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2780  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2781  * buffer (the functions we call will append names onto the end, but the old
2782  * dir value will be restored on exit). */
2783 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2784 {
2785         struct file_list *dirlist;
2786         char dirbuf[MAXPATHLEN];
2787         int save_recurse = recurse;
2788         int save_xfer_dirs = xfer_dirs;
2789         int save_prune_empty_dirs = prune_empty_dirs;
2790
2791         if (dlen < 0) {
2792                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2793                 if (dlen >= MAXPATHLEN)
2794                         return NULL;
2795                 dirname = dirbuf;
2796         }
2797
2798         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2799
2800         recurse = 0;
2801         xfer_dirs = 1;
2802         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2803         xfer_dirs = save_xfer_dirs;
2804         recurse = save_recurse;
2805         if (do_progress)
2806                 flist_count_offset += dirlist->used;
2807
2808         prune_empty_dirs = 0;
2809         dirlist->sorted = dirlist->files;
2810         flist_sort_and_clean(dirlist, 0);
2811         prune_empty_dirs = save_prune_empty_dirs;
2812
2813         if (verbose > 3)
2814                 output_flist(dirlist);
2815
2816         return dirlist;
2817 }