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