9e5bdd00e5a26dc0974c1081fce5733e8b868e89
[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 eol_nulls;
56 extern int relative_paths;
57 extern int implied_dirs;
58 extern int ignore_perishable;
59 extern int non_perishable_cnt;
60 extern int prune_empty_dirs;
61 extern int copy_links;
62 extern int copy_unsafe_links;
63 extern int protocol_version;
64 extern int sanitize_paths;
65 extern int munge_symlinks;
66 extern int use_safe_inc_flist;
67 extern int need_unsorted_flist;
68 extern int sender_symlink_iconv;
69 extern int unsort_ndx;
70 extern uid_t our_uid;
71 extern struct stats stats;
72 extern char *filesfrom_host;
73
74 extern char curr_dir[MAXPATHLEN];
75
76 extern struct chmod_mode_struct *chmod_modes;
77
78 extern struct filter_list_struct filter_list;
79 extern struct filter_list_struct daemon_filter_list;
80
81 #ifdef ICONV_OPTION
82 extern int filesfrom_convert;
83 extern iconv_t ic_send, ic_recv;
84 #endif
85
86 #define PTR_SIZE (sizeof (struct file_struct *))
87
88 int io_error;
89 int checksum_len;
90 dev_t filesystem_dev; /* used to implement -x */
91
92 struct file_list *cur_flist, *first_flist, *dir_flist;
93 int send_dir_ndx = -1, send_dir_depth = -1;
94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
95 int file_total = 0; /* total of all active items over all file-lists */
96 int flist_eof = 0; /* all the file-lists are now known */
97
98 #define NORMAL_NAME 0
99 #define SLASH_ENDING_NAME 1
100 #define DOTDIR_NAME 2
101
102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
103  * internally, even if this platform does not allow files to have 64-bit inums.
104  * The only exception is if we're on a platform with no 64-bit type at all.
105  *
106  * Because we use read_longint() to get these off the wire, if you transfer
107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
108  * machine with no 64-bit types then you will get an overflow error.
109  *
110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
112  * be truncated.  But it's a kind of silly thing to do anyhow. */
113
114 /* The tmp_* vars are used as a cache area by make_file() to store data
115  * that the sender doesn't need to remember in its file list.  The data
116  * will survive just long enough to be used by send_file_entry(). */
117 static dev_t tmp_rdev;
118 #ifdef SUPPORT_HARD_LINKS
119 static int64 tmp_dev = -1, tmp_ino;
120 #endif
121 static char tmp_sum[MAX_DIGEST_LEN];
122
123 static char empty_sum[MAX_DIGEST_LEN];
124 static int flist_count_offset; /* for --delete --progress */
125 static int dir_count = 0;
126
127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
128 static void output_flist(struct file_list *flist);
129
130 void init_flist(void)
131 {
132         if (verbose > 4) {
133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
135         }
136         checksum_len = protocol_version < 21 ? 2
137                      : protocol_version < 30 ? MD4_DIGEST_LEN
138                      : MD5_DIGEST_LEN;
139 }
140
141 static int show_filelist_p(void)
142 {
143         return verbose && xfer_dirs && !am_server && !inc_recurse;
144 }
145
146 static void start_filelist_progress(char *kind)
147 {
148         rprintf(FCLIENT, "%s ... ", kind);
149         if (verbose > 1 || do_progress)
150                 rprintf(FCLIENT, "\n");
151         rflush(FINFO);
152 }
153
154 static void emit_filelist_progress(int count)
155 {
156         rprintf(FCLIENT, " %d files...\r", count);
157 }
158
159 static void maybe_emit_filelist_progress(int count)
160 {
161         if (do_progress && show_filelist_p() && (count % 100) == 0)
162                 emit_filelist_progress(count);
163 }
164
165 static void finish_filelist_progress(const struct file_list *flist)
166 {
167         if (do_progress) {
168                 /* This overwrites the progress line */
169                 rprintf(FINFO, "%d file%sto consider\n",
170                         flist->used, flist->used == 1 ? " " : "s ");
171         } else
172                 rprintf(FINFO, "done\n");
173 }
174
175 void show_flist_stats(void)
176 {
177         /* Nothing yet */
178 }
179
180 /* Stat either a symlink or its referent, depending on the settings of
181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
182  *
183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
184  * MAXPATHLEN chars) will be set to the symlink's target string.
185  *
186  * The stat structure pointed to by stp will contain information about the
187  * link or the referent as appropriate, if they exist. */
188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
189 {
190 #ifdef SUPPORT_LINKS
191         if (link_stat(path, stp, copy_dirlinks) < 0)
192                 return -1;
193         if (S_ISLNK(stp->st_mode)) {
194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
195                 if (llen < 0)
196                         return -1;
197                 linkbuf[llen] = '\0';
198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
199                         if (verbose > 1) {
200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
201                                         path, linkbuf);
202                         }
203                         return x_stat(path, stp, NULL);
204                 }
205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
208                                 llen - SYMLINK_PREFIX_LEN + 1);
209                 }
210         }
211         return 0;
212 #else
213         return x_stat(path, stp, NULL);
214 #endif
215 }
216
217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
218 {
219 #ifdef SUPPORT_LINKS
220         if (copy_links)
221                 return x_stat(path, stp, NULL);
222         if (x_lstat(path, stp, NULL) < 0)
223                 return -1;
224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
225                 STRUCT_STAT st;
226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
227                         *stp = st;
228         }
229         return 0;
230 #else
231         return x_stat(path, stp, NULL);
232 #endif
233 }
234
235 static inline int is_daemon_excluded(const char *fname, int is_dir)
236 {
237         if (daemon_filter_list.head
238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
239                 errno = ENOENT;
240                 return 1;
241         }
242         return 0;
243 }
244
245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
246 {
247         if (daemon_filter_list.head) {
248                 char *slash = path;
249
250                 while ((slash = strchr(slash+1, '/')) != NULL) {
251                         int ret;
252                         *slash = '\0';
253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
254                         *slash = '/';
255                         if (ret < 0) {
256                                 errno = ENOENT;
257                                 return 1;
258                         }
259                 }
260
261                 if (!ignore_filename
262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
263                         errno = ENOENT;
264                         return 1;
265                 }
266         }
267
268         return 0;
269 }
270
271 /* This function is used to check if a file should be included/excluded
272  * from the list of files based on its name and type etc.  The value of
273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
274 static int is_excluded(const char *fname, int is_dir, int filter_level)
275 {
276 #if 0 /* This currently never happens, so avoid a useless compare. */
277         if (filter_level == NO_FILTERS)
278                 return 0;
279 #endif
280         if (is_daemon_excluded(fname, is_dir))
281                 return 1;
282         if (filter_level != ALL_FILTERS)
283                 return 0;
284         if (filter_list.head
285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
286                 return 1;
287         return 0;
288 }
289
290 static void send_directory(int f, struct file_list *flist,
291                            char *fbuf, int len, int flags);
292
293 static const char *pathname, *orig_dir;
294 static int pathname_len;
295
296 /* Make sure flist can hold at least flist->used + extra entries. */
297 static void flist_expand(struct file_list *flist, int extra)
298 {
299         struct file_struct **new_ptr;
300
301         if (flist->used + extra <= flist->malloced)
302                 return;
303
304         if (flist->malloced < FLIST_START)
305                 flist->malloced = FLIST_START;
306         else if (flist->malloced >= FLIST_LINEAR)
307                 flist->malloced += FLIST_LINEAR;
308         else
309                 flist->malloced *= 2;
310
311         /* In case count jumped or we are starting the list
312          * with a known size just set it. */
313         if (flist->malloced < flist->used + extra)
314                 flist->malloced = flist->used + extra;
315
316         new_ptr = realloc_array(flist->files, struct file_struct *,
317                                 flist->malloced);
318
319         if (verbose >= 2 && flist->malloced != FLIST_START) {
320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
321                     who_am_i(),
322                     (double)sizeof flist->files[0] * flist->malloced,
323                     (new_ptr == flist->files) ? " not" : "");
324         }
325
326         flist->files = new_ptr;
327
328         if (!flist->files)
329                 out_of_memory("flist_expand");
330 }
331
332 static void flist_done_allocating(struct file_list *flist)
333 {
334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
335         if (flist->pool_boundary == ptr)
336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
337         else
338                 flist->pool_boundary = ptr;
339 }
340
341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
343  * with dir == NULL taken to be the starting directory, and dirlen < 0
344  * indicating that strdup(dir) should be called and then the -dirlen length
345  * value checked to ensure that it is not daemon-excluded. */
346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
347 {
348         if (dirlen < 0) {
349                 char *cpy = strdup(dir);
350                 if (*cpy != '/')
351                         change_dir(orig_dir, CD_SKIP_CHDIR);
352                 if (path_is_daemon_excluded(cpy, 0))
353                         goto chdir_error;
354                 dir = cpy;
355                 dirlen = -dirlen;
356         } else {
357                 if (file) {
358                         if (pathname == F_PATHNAME(file))
359                                 return 1;
360                         dir = F_PATHNAME(file);
361                         if (dir)
362                                 dirlen = strlen(dir);
363                 } else if (pathname == dir)
364                         return 1;
365                 if (dir && *dir != '/')
366                         change_dir(orig_dir, CD_SKIP_CHDIR);
367         }
368
369         pathname = dir;
370         pathname_len = dirlen;
371
372         if (!dir)
373                 dir = orig_dir;
374
375         if (!change_dir(dir, CD_NORMAL)) {
376           chdir_error:
377                 io_error |= IOERR_GENERAL;
378                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
379                 if (dir != orig_dir)
380                         change_dir(orig_dir, CD_NORMAL);
381                 pathname = NULL;
382                 pathname_len = 0;
383                 return 0;
384         }
385
386         return 1;
387 }
388
389 static void send_file_entry(int f, const char *fname, struct file_struct *file,
390 #ifdef SUPPORT_LINKS
391                             const char *symlink_name, int symlink_len,
392 #endif
393                             int ndx, int first_ndx)
394 {
395         static time_t modtime;
396         static mode_t mode;
397 #ifdef SUPPORT_HARD_LINKS
398         static int64 dev;
399 #endif
400         static dev_t rdev;
401         static uint32 rdev_major;
402         static uid_t uid;
403         static gid_t gid;
404         static const char *user_name, *group_name;
405         static char lastname[MAXPATHLEN];
406         int first_hlink_ndx = -1;
407         int l1, l2;
408         int xflags;
409
410         /* Initialize starting value of xflags. */
411         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
412                 dir_count++;
413                 if (file->flags & FLAG_CONTENT_DIR)
414                         xflags = file->flags & FLAG_TOP_DIR;
415                 else if (file->flags & FLAG_IMPLIED_DIR)
416                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
417                 else
418                         xflags = XMIT_NO_CONTENT_DIR;
419         } else
420                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
421
422         if (file->mode == mode)
423                 xflags |= XMIT_SAME_MODE;
424         else
425                 mode = file->mode;
426
427         if (preserve_devices && IS_DEVICE(mode)) {
428                 if (protocol_version < 28) {
429                         if (tmp_rdev == rdev)
430                                 xflags |= XMIT_SAME_RDEV_pre28;
431                         else
432                                 rdev = tmp_rdev;
433                 } else {
434                         rdev = tmp_rdev;
435                         if ((uint32)major(rdev) == rdev_major)
436                                 xflags |= XMIT_SAME_RDEV_MAJOR;
437                         else
438                                 rdev_major = major(rdev);
439                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
440                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
441                 }
442         } else if (preserve_specials && IS_SPECIAL(mode)) {
443                 /* Special files don't need an rdev number, so just make
444                  * the historical transmission of the value efficient. */
445                 if (protocol_version < 28)
446                         xflags |= XMIT_SAME_RDEV_pre28;
447                 else {
448                         rdev = MAKEDEV(major(rdev), 0);
449                         xflags |= XMIT_SAME_RDEV_MAJOR;
450                         if (protocol_version < 30)
451                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
452                 }
453         } else if (protocol_version < 28)
454                 rdev = MAKEDEV(0, 0);
455         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
456                 xflags |= XMIT_SAME_UID;
457         else {
458                 uid = F_OWNER(file);
459                 if (!numeric_ids) {
460                         user_name = add_uid(uid);
461                         if (inc_recurse && user_name)
462                                 xflags |= XMIT_USER_NAME_FOLLOWS;
463                 }
464         }
465         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
466                 xflags |= XMIT_SAME_GID;
467         else {
468                 gid = F_GROUP(file);
469                 if (!numeric_ids) {
470                         group_name = add_gid(gid);
471                         if (inc_recurse && group_name)
472                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
473                 }
474         }
475         if (file->modtime == modtime)
476                 xflags |= XMIT_SAME_TIME;
477         else
478                 modtime = file->modtime;
479
480 #ifdef SUPPORT_HARD_LINKS
481         if (tmp_dev != -1) {
482                 if (protocol_version >= 30) {
483                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
484                         first_hlink_ndx = (int32)(long)np->data - 1;
485                         if (first_hlink_ndx < 0) {
486                                 np->data = (void*)(long)(first_ndx + ndx + 1);
487                                 xflags |= XMIT_HLINK_FIRST;
488                         }
489                 } else {
490                         if (tmp_dev == dev) {
491                                 if (protocol_version >= 28)
492                                         xflags |= XMIT_SAME_DEV_pre30;
493                         } else
494                                 dev = tmp_dev;
495                 }
496                 xflags |= XMIT_HLINKED;
497         }
498 #endif
499
500         for (l1 = 0;
501             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
502             l1++) {}
503         l2 = strlen(fname+l1);
504
505         if (l1 > 0)
506                 xflags |= XMIT_SAME_NAME;
507         if (l2 > 255)
508                 xflags |= XMIT_LONG_NAME;
509
510         /* We must make sure we don't send a zero flag byte or the
511          * other end will terminate the flist transfer.  Note that
512          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
513          * it's harmless way to add a bit to the first flag byte. */
514         if (protocol_version >= 28) {
515                 if (!xflags && !S_ISDIR(mode))
516                         xflags |= XMIT_TOP_DIR;
517                 if ((xflags & 0xFF00) || !xflags) {
518                         xflags |= XMIT_EXTENDED_FLAGS;
519                         write_shortint(f, xflags);
520                 } else
521                         write_byte(f, xflags);
522         } else {
523                 if (!(xflags & 0xFF))
524                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
525                 write_byte(f, xflags);
526         }
527         if (xflags & XMIT_SAME_NAME)
528                 write_byte(f, l1);
529         if (xflags & XMIT_LONG_NAME)
530                 write_varint30(f, l2);
531         else
532                 write_byte(f, l2);
533         write_buf(f, fname + l1, l2);
534
535         if (first_hlink_ndx >= 0) {
536                 write_varint(f, first_hlink_ndx);
537                 if (first_hlink_ndx >= first_ndx)
538                         goto the_end;
539         }
540
541         write_varlong30(f, F_LENGTH(file), 3);
542         if (!(xflags & XMIT_SAME_TIME)) {
543                 if (protocol_version >= 30)
544                         write_varlong(f, modtime, 4);
545                 else
546                         write_int(f, modtime);
547         }
548         if (!(xflags & XMIT_SAME_MODE))
549                 write_int(f, to_wire_mode(mode));
550         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
551                 if (protocol_version < 30)
552                         write_int(f, uid);
553                 else {
554                         write_varint(f, uid);
555                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
556                                 int len = strlen(user_name);
557                                 write_byte(f, len);
558                                 write_buf(f, user_name, len);
559                         }
560                 }
561         }
562         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
563                 if (protocol_version < 30)
564                         write_int(f, gid);
565                 else {
566                         write_varint(f, gid);
567                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
568                                 int len = strlen(group_name);
569                                 write_byte(f, len);
570                                 write_buf(f, group_name, len);
571                         }
572                 }
573         }
574         if ((preserve_devices && IS_DEVICE(mode))
575          || (preserve_specials && IS_SPECIAL(mode))) {
576                 if (protocol_version < 28) {
577                         if (!(xflags & XMIT_SAME_RDEV_pre28))
578                                 write_int(f, (int)rdev);
579                 } else {
580                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
581                                 write_varint30(f, major(rdev));
582                         if (protocol_version >= 30)
583                                 write_varint(f, minor(rdev));
584                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
585                                 write_byte(f, minor(rdev));
586                         else
587                                 write_int(f, minor(rdev));
588                 }
589         }
590
591 #ifdef SUPPORT_LINKS
592         if (symlink_len) {
593                 write_varint30(f, symlink_len);
594                 write_buf(f, symlink_name, symlink_len);
595         }
596 #endif
597
598 #ifdef SUPPORT_HARD_LINKS
599         if (tmp_dev != -1 && protocol_version < 30) {
600                 /* Older protocols expect the dev number to be transmitted
601                  * 1-incremented so that it is never zero. */
602                 if (protocol_version < 26) {
603                         /* 32-bit dev_t and ino_t */
604                         write_int(f, (int32)(dev+1));
605                         write_int(f, (int32)tmp_ino);
606                 } else {
607                         /* 64-bit dev_t and ino_t */
608                         if (!(xflags & XMIT_SAME_DEV_pre30))
609                                 write_longint(f, dev+1);
610                         write_longint(f, tmp_ino);
611                 }
612         }
613 #endif
614
615         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
616                 const char *sum;
617                 if (S_ISREG(mode))
618                         sum = tmp_sum;
619                 else {
620                         /* Prior to 28, we sent a useless set of nulls. */
621                         sum = empty_sum;
622                 }
623                 write_buf(f, sum, checksum_len);
624         }
625
626   the_end:
627         strlcpy(lastname, fname, MAXPATHLEN);
628
629         if (S_ISREG(mode) || S_ISLNK(mode))
630                 stats.total_size += F_LENGTH(file);
631 }
632
633 static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags)
634 {
635         static int64 modtime;
636         static mode_t mode;
637 #ifdef SUPPORT_HARD_LINKS
638         static int64 dev;
639 #endif
640         static dev_t rdev;
641         static uint32 rdev_major;
642         static uid_t uid;
643         static gid_t gid;
644         static uint16 gid_flags;
645         static char lastname[MAXPATHLEN], *lastdir;
646         static int lastdir_depth, lastdir_len = -1;
647         static unsigned int del_hier_name_len = 0;
648         static int in_del_hier = 0;
649         char thisname[MAXPATHLEN];
650         unsigned int l1 = 0, l2 = 0;
651         int alloc_len, basename_len, linkname_len;
652         int extra_len = file_extra_cnt * EXTRA_LEN;
653         int first_hlink_ndx = -1;
654         int64 file_length;
655         const char *basename;
656         struct file_struct *file;
657         alloc_pool_t *pool;
658         char *bp;
659
660         if (xflags & XMIT_SAME_NAME)
661                 l1 = read_byte(f);
662
663         if (xflags & XMIT_LONG_NAME)
664                 l2 = read_varint30(f);
665         else
666                 l2 = read_byte(f);
667
668         if (l2 >= MAXPATHLEN - l1) {
669                 rprintf(FERROR,
670                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
671                         xflags, l1, l2, lastname, who_am_i());
672                 overflow_exit("recv_file_entry");
673         }
674
675         strlcpy(thisname, lastname, l1 + 1);
676         read_sbuf(f, &thisname[l1], l2);
677         thisname[l1 + l2] = 0;
678
679         /* Abuse basename_len for a moment... */
680         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
681
682 #ifdef ICONV_OPTION
683         if (ic_recv != (iconv_t)-1) {
684                 xbuf outbuf, inbuf;
685
686                 INIT_CONST_XBUF(outbuf, thisname);
687                 INIT_XBUF(inbuf, lastname, basename_len, -1);
688
689                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
690                         io_error |= IOERR_GENERAL;
691                         rprintf(FERROR_UTF8,
692                             "[%s] cannot convert filename: %s (%s)\n",
693                             who_am_i(), lastname, strerror(errno));
694                         outbuf.len = 0;
695                 }
696                 thisname[outbuf.len] = '\0';
697         }
698 #endif
699
700         if (*thisname)
701                 clean_fname(thisname, 0);
702
703         if (sanitize_paths)
704                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
705
706         if ((basename = strrchr(thisname, '/')) != NULL) {
707                 int len = basename++ - thisname;
708                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
709                         lastdir = new_array(char, len + 1);
710                         memcpy(lastdir, thisname, len);
711                         lastdir[len] = '\0';
712                         lastdir_len = len;
713                         lastdir_depth = count_dir_elements(lastdir);
714                 }
715         } else
716                 basename = thisname;
717         basename_len = strlen(basename) + 1; /* count the '\0' */
718
719 #ifdef SUPPORT_HARD_LINKS
720         if (protocol_version >= 30
721          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
722                 first_hlink_ndx = read_varint(f);
723                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
724                         rprintf(FERROR,
725                                 "hard-link reference out of range: %d (%d)\n",
726                                 first_hlink_ndx, flist->ndx_start + flist->used);
727                         exit_cleanup(RERR_PROTOCOL);
728                 }
729                 if (first_hlink_ndx >= flist->ndx_start) {
730                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
731                         file_length = F_LENGTH(first);
732                         modtime = first->modtime;
733                         mode = first->mode;
734                         if (preserve_uid)
735                                 uid = F_OWNER(first);
736                         if (preserve_gid)
737                                 gid = F_GROUP(first);
738                         if (preserve_devices && IS_DEVICE(mode)) {
739                                 uint32 *devp = F_RDEV_P(first);
740                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
741                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
742                         }
743                         if (preserve_links && S_ISLNK(mode))
744                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
745                         else
746                                 linkname_len = 0;
747                         goto create_object;
748                 }
749         }
750 #endif
751
752         file_length = read_varlong30(f, 3);
753         if (!(xflags & XMIT_SAME_TIME)) {
754                 if (protocol_version >= 30) {
755                         modtime = read_varlong(f, 4);
756 #if SIZEOF_TIME_T < SIZEOF_INT64
757                         if (!am_generator && (int64)(time_t)modtime != modtime) {
758                                 rprintf(FERROR_XFER,
759                                     "Time value of %s truncated on receiver.\n",
760                                     lastname);
761                         }
762 #endif
763                 } else
764                         modtime = read_int(f);
765         }
766         if (!(xflags & XMIT_SAME_MODE))
767                 mode = from_wire_mode(read_int(f));
768
769         if (chmod_modes && !S_ISLNK(mode))
770                 mode = tweak_mode(mode, chmod_modes);
771
772         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
773                 if (protocol_version < 30)
774                         uid = (uid_t)read_int(f);
775                 else {
776                         uid = (uid_t)read_varint(f);
777                         if (xflags & XMIT_USER_NAME_FOLLOWS)
778                                 uid = recv_user_name(f, uid);
779                         else if (inc_recurse && am_root && !numeric_ids)
780                                 uid = match_uid(uid);
781                 }
782         }
783         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
784                 if (protocol_version < 30)
785                         gid = (gid_t)read_int(f);
786                 else {
787                         gid = (gid_t)read_varint(f);
788                         gid_flags = 0;
789                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
790                                 gid = recv_group_name(f, gid, &gid_flags);
791                         else if (inc_recurse && (!am_root || !numeric_ids))
792                                 gid = match_gid(gid, &gid_flags);
793                 }
794         }
795
796         if ((preserve_devices && IS_DEVICE(mode))
797          || (preserve_specials && IS_SPECIAL(mode))) {
798                 if (protocol_version < 28) {
799                         if (!(xflags & XMIT_SAME_RDEV_pre28))
800                                 rdev = (dev_t)read_int(f);
801                 } else {
802                         uint32 rdev_minor;
803                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
804                                 rdev_major = read_varint30(f);
805                         if (protocol_version >= 30)
806                                 rdev_minor = read_varint(f);
807                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
808                                 rdev_minor = read_byte(f);
809                         else
810                                 rdev_minor = read_int(f);
811                         rdev = MAKEDEV(rdev_major, rdev_minor);
812                 }
813                 if (IS_DEVICE(mode))
814                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
815                 file_length = 0;
816         } else if (protocol_version < 28)
817                 rdev = MAKEDEV(0, 0);
818
819 #ifdef SUPPORT_LINKS
820         if (preserve_links && S_ISLNK(mode)) {
821                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
822                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
823                         rprintf(FERROR, "overflow: linkname_len=%d\n",
824                                 linkname_len - 1);
825                         overflow_exit("recv_file_entry");
826                 }
827 #ifdef ICONV_OPTION
828                 /* We don't know how much extra room we need to convert
829                  * the as-yet-unread symlink data, so let's hope that a
830                  * double-size buffer is plenty. */
831                 if (sender_symlink_iconv)
832                         linkname_len *= 2;
833 #endif
834                 if (munge_symlinks)
835                         linkname_len += SYMLINK_PREFIX_LEN;
836         }
837         else
838 #endif
839                 linkname_len = 0;
840
841 #ifdef SUPPORT_HARD_LINKS
842   create_object:
843         if (preserve_hard_links) {
844                 if (protocol_version < 28 && S_ISREG(mode))
845                         xflags |= XMIT_HLINKED;
846                 if (xflags & XMIT_HLINKED)
847                         extra_len += (inc_recurse+1) * EXTRA_LEN;
848         }
849 #endif
850
851 #ifdef SUPPORT_ACLS
852         /* Directories need an extra int32 for the default ACL. */
853         if (preserve_acls && S_ISDIR(mode))
854                 extra_len += EXTRA_LEN;
855 #endif
856
857         if (always_checksum && S_ISREG(mode))
858                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
859
860 #if SIZEOF_INT64 >= 8
861         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
862                 extra_len += EXTRA_LEN;
863 #endif
864         if (file_length < 0) {
865                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
866                 exit_cleanup(RERR_UNSUPPORTED);
867         }
868
869         if (inc_recurse && S_ISDIR(mode)) {
870                 if (one_file_system) {
871                         /* Room to save the dir's device for -x */
872                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
873                 }
874                 pool = dir_flist->file_pool;
875         } else
876                 pool = flist->file_pool;
877
878 #if EXTRA_ROUNDING > 0
879         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
880                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
881 #endif
882
883         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
884                   + linkname_len;
885         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
886
887         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
888         bp += extra_len;
889         file = (struct file_struct *)bp;
890         bp += FILE_STRUCT_LEN;
891
892         memcpy(bp, basename, basename_len);
893
894 #ifdef SUPPORT_HARD_LINKS
895         if (xflags & XMIT_HLINKED)
896                 file->flags |= FLAG_HLINKED;
897 #endif
898         file->modtime = (time_t)modtime;
899         file->len32 = (uint32)file_length;
900 #if SIZEOF_INT64 >= 8
901         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
902 #if SIZEOF_CAPITAL_OFF_T < 8
903                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
904                 exit_cleanup(RERR_UNSUPPORTED);
905 #else
906                 file->flags |= FLAG_LENGTH64;
907                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
908 #endif
909         }
910 #endif
911         file->mode = mode;
912         if (preserve_uid)
913                 F_OWNER(file) = uid;
914         if (preserve_gid) {
915                 F_GROUP(file) = gid;
916                 file->flags |= gid_flags;
917         }
918         if (unsort_ndx)
919                 F_NDX(file) = flist->used + flist->ndx_start;
920
921         if (basename != thisname) {
922                 file->dirname = lastdir;
923                 F_DEPTH(file) = lastdir_depth + 1;
924         } else
925                 F_DEPTH(file) = 1;
926
927         if (S_ISDIR(mode)) {
928                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
929                         F_DEPTH(file)--;
930                 if (protocol_version >= 30) {
931                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
932                                 if (xflags & XMIT_TOP_DIR)
933                                         file->flags |= FLAG_TOP_DIR;
934                                 file->flags |= FLAG_CONTENT_DIR;
935                         } else if (xflags & XMIT_TOP_DIR)
936                                 file->flags |= FLAG_IMPLIED_DIR;
937                 } else if (xflags & XMIT_TOP_DIR) {
938                         in_del_hier = recurse;
939                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
940                         if (relative_paths && del_hier_name_len > 2
941                             && lastname[del_hier_name_len-1] == '.'
942                             && lastname[del_hier_name_len-2] == '/')
943                                 del_hier_name_len -= 2;
944                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
945                 } else if (in_del_hier) {
946                         if (!relative_paths || !del_hier_name_len
947                          || (l1 >= del_hier_name_len
948                           && lastname[del_hier_name_len] == '/'))
949                                 file->flags |= FLAG_CONTENT_DIR;
950                         else
951                                 in_del_hier = 0;
952                 }
953         }
954
955         if (preserve_devices && IS_DEVICE(mode)) {
956                 uint32 *devp = F_RDEV_P(file);
957                 DEV_MAJOR(devp) = major(rdev);
958                 DEV_MINOR(devp) = minor(rdev);
959         }
960
961 #ifdef SUPPORT_LINKS
962         if (linkname_len) {
963                 bp += basename_len;
964                 if (first_hlink_ndx >= flist->ndx_start) {
965                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
966                         memcpy(bp, F_SYMLINK(first), linkname_len);
967                 } else {
968                         if (munge_symlinks) {
969                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
970                                 bp += SYMLINK_PREFIX_LEN;
971                                 linkname_len -= SYMLINK_PREFIX_LEN;
972                         }
973 #ifdef ICONV_OPTION
974                         if (sender_symlink_iconv) {
975                                 xbuf outbuf, inbuf;
976
977                                 alloc_len = linkname_len;
978                                 linkname_len /= 2;
979
980                                 /* Read the symlink data into the end of our double-sized
981                                  * buffer and then convert it into the right spot. */
982                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
983                                           linkname_len - 1, (size_t)-1);
984                                 read_sbuf(f, inbuf.buf, inbuf.len);
985                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
986
987                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
988                                         io_error |= IOERR_GENERAL;
989                                         rprintf(FERROR_XFER,
990                                             "[%s] cannot convert symlink data for: %s (%s)\n",
991                                             who_am_i(), full_fname(thisname), strerror(errno));
992                                         bp = (char*)file->basename;
993                                         *bp++ = '\0';
994                                         outbuf.len = 0;
995                                 }
996                                 bp[outbuf.len] = '\0';
997                         } else
998 #endif
999                                 read_sbuf(f, bp, linkname_len - 1);
1000                         if (sanitize_paths && !munge_symlinks && *bp)
1001                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1002                 }
1003         }
1004 #endif
1005
1006 #ifdef SUPPORT_HARD_LINKS
1007         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1008                 if (protocol_version >= 30) {
1009                         if (xflags & XMIT_HLINK_FIRST) {
1010                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1011                         } else
1012                                 F_HL_GNUM(file) = first_hlink_ndx;
1013                 } else {
1014                         static int32 cnt = 0;
1015                         struct ht_int64_node *np;
1016                         int64 ino;
1017                         int32 ndx;
1018                         if (protocol_version < 26) {
1019                                 dev = read_int(f);
1020                                 ino = read_int(f);
1021                         } else {
1022                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1023                                         dev = read_longint(f);
1024                                 ino = read_longint(f);
1025                         }
1026                         np = idev_find(dev, ino);
1027                         ndx = (int32)(long)np->data - 1;
1028                         if (ndx < 0) {
1029                                 ndx = cnt++;
1030                                 np->data = (void*)(long)cnt;
1031                         }
1032                         F_HL_GNUM(file) = ndx;
1033                 }
1034         }
1035 #endif
1036
1037         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1038                 if (S_ISREG(mode))
1039                         bp = F_SUM(file);
1040                 else {
1041                         /* Prior to 28, we get a useless set of nulls. */
1042                         bp = tmp_sum;
1043                 }
1044                 if (first_hlink_ndx >= flist->ndx_start) {
1045                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1046                         memcpy(bp, F_SUM(first), checksum_len);
1047                 } else
1048                         read_buf(f, bp, checksum_len);
1049         }
1050
1051 #ifdef SUPPORT_ACLS
1052         if (preserve_acls && !S_ISLNK(mode))
1053                 receive_acl(f, file);
1054 #endif
1055 #ifdef SUPPORT_XATTRS
1056         if (preserve_xattrs)
1057                 receive_xattr(f, file);
1058 #endif
1059
1060         if (S_ISREG(mode) || S_ISLNK(mode))
1061                 stats.total_size += file_length;
1062
1063         return file;
1064 }
1065
1066 /* Create a file_struct for a named file by reading its stat() information
1067  * and performing extensive checks against global options.
1068  *
1069  * Returns a pointer to the new file struct, or NULL if there was an error
1070  * or this file should be excluded.
1071  *
1072  * Note: Any error (here or in send_file_name) that results in the omission of
1073  * an existent source file from the file list should set
1074  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1075  * destination if --delete is on. */
1076 struct file_struct *make_file(const char *fname, struct file_list *flist,
1077                               STRUCT_STAT *stp, int flags, int filter_level)
1078 {
1079         static char *lastdir;
1080         static int lastdir_len = -1;
1081         struct file_struct *file;
1082         char thisname[MAXPATHLEN];
1083         char linkname[MAXPATHLEN];
1084         int alloc_len, basename_len, linkname_len;
1085         int extra_len = file_extra_cnt * EXTRA_LEN;
1086         const char *basename;
1087         alloc_pool_t *pool;
1088         STRUCT_STAT st;
1089         char *bp;
1090
1091         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1092                 io_error |= IOERR_GENERAL;
1093                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1094                 return NULL;
1095         }
1096         clean_fname(thisname, 0);
1097         if (sanitize_paths)
1098                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1099
1100         if (stp && S_ISDIR(stp->st_mode)) {
1101                 st = *stp; /* Needed for "symlink/." with --relative. */
1102                 *linkname = '\0'; /* make IBM code checker happy */
1103         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1104                 int save_errno = errno;
1105                 /* See if file is excluded before reporting an error. */
1106                 if (filter_level != NO_FILTERS
1107                  && (is_excluded(thisname, 0, filter_level)
1108                   || is_excluded(thisname, 1, filter_level))) {
1109                         if (ignore_perishable && save_errno != ENOENT)
1110                                 non_perishable_cnt++;
1111                         return NULL;
1112                 }
1113                 if (save_errno == ENOENT) {
1114 #ifdef SUPPORT_LINKS
1115                         /* When our options tell us to follow a symlink that
1116                          * points nowhere, tell the user about the symlink
1117                          * instead of giving a "vanished" message.  We only
1118                          * dereference a symlink if one of the --copy*links
1119                          * options was specified, so there's no need for the
1120                          * extra lstat() if one of these options isn't on. */
1121                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1122                          && x_lstat(thisname, &st, NULL) == 0
1123                          && S_ISLNK(st.st_mode)) {
1124                                 io_error |= IOERR_GENERAL;
1125                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1126                                         full_fname(thisname));
1127                         } else
1128 #endif
1129                         {
1130                                 enum logcode c = am_daemon && protocol_version < 28
1131                                                ? FERROR : FWARNING;
1132                                 io_error |= IOERR_VANISHED;
1133                                 rprintf(c, "file has vanished: %s\n",
1134                                         full_fname(thisname));
1135                         }
1136                 } else {
1137                         io_error |= IOERR_GENERAL;
1138                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1139                                 full_fname(thisname));
1140                 }
1141                 return NULL;
1142         }
1143
1144         if (filter_level == NO_FILTERS)
1145                 goto skip_filters;
1146
1147         if (S_ISDIR(st.st_mode)) {
1148                 if (!xfer_dirs) {
1149                         rprintf(FINFO, "skipping directory %s\n", thisname);
1150                         return NULL;
1151                 }
1152                 /* -x only affects dirs because we need to avoid recursing
1153                  * into a mount-point directory, not to avoid copying a
1154                  * symlinked file if -L (or similar) was specified. */
1155                 if (one_file_system && st.st_dev != filesystem_dev
1156                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1157                         if (one_file_system > 1) {
1158                                 if (verbose > 1) {
1159                                         rprintf(FINFO,
1160                                             "[%s] skipping mount-point dir %s\n",
1161                                             who_am_i(), thisname);
1162                                 }
1163                                 return NULL;
1164                         }
1165                         flags |= FLAG_MOUNT_DIR;
1166                         flags &= ~FLAG_CONTENT_DIR;
1167                 }
1168         } else
1169                 flags &= ~FLAG_CONTENT_DIR;
1170
1171         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1172                 if (ignore_perishable)
1173                         non_perishable_cnt++;
1174                 return NULL;
1175         }
1176
1177         if (lp_ignore_nonreadable(module_id)) {
1178 #ifdef SUPPORT_LINKS
1179                 if (!S_ISLNK(st.st_mode))
1180 #endif
1181                         if (access(thisname, R_OK) != 0)
1182                                 return NULL;
1183         }
1184
1185   skip_filters:
1186
1187         /* Only divert a directory in the main transfer. */
1188         if (flist) {
1189                 if (flist->prev && S_ISDIR(st.st_mode)
1190                  && flags & FLAG_DIVERT_DIRS) {
1191                         /* Room for parent/sibling/next-child info. */
1192                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1193                         if (relative_paths)
1194                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1195                         pool = dir_flist->file_pool;
1196                 } else
1197                         pool = flist->file_pool;
1198         } else {
1199 #ifdef SUPPORT_ACLS
1200                 /* Directories need an extra int32 for the default ACL. */
1201                 if (preserve_acls && S_ISDIR(st.st_mode))
1202                         extra_len += EXTRA_LEN;
1203 #endif
1204                 pool = NULL;
1205         }
1206
1207         if (verbose > 2) {
1208                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1209                         who_am_i(), thisname, filter_level);
1210         }
1211
1212         if ((basename = strrchr(thisname, '/')) != NULL) {
1213                 int len = basename++ - thisname;
1214                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1215                         lastdir = new_array(char, len + 1);
1216                         memcpy(lastdir, thisname, len);
1217                         lastdir[len] = '\0';
1218                         lastdir_len = len;
1219                 }
1220         } else
1221                 basename = thisname;
1222         basename_len = strlen(basename) + 1; /* count the '\0' */
1223
1224 #ifdef SUPPORT_LINKS
1225         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1226 #else
1227         linkname_len = 0;
1228 #endif
1229
1230 #if SIZEOF_CAPITAL_OFF_T >= 8
1231         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1232                 extra_len += EXTRA_LEN;
1233 #endif
1234
1235 #if EXTRA_ROUNDING > 0
1236         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1237                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1238 #endif
1239
1240         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1241                   + linkname_len;
1242         if (pool)
1243                 bp = pool_alloc(pool, alloc_len, "make_file");
1244         else {
1245                 if (!(bp = new_array(char, alloc_len)))
1246                         out_of_memory("make_file");
1247         }
1248
1249         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1250         bp += extra_len;
1251         file = (struct file_struct *)bp;
1252         bp += FILE_STRUCT_LEN;
1253
1254         memcpy(bp, basename, basename_len);
1255
1256 #ifdef SUPPORT_HARD_LINKS
1257         if (preserve_hard_links && flist && flist->prev) {
1258                 if (protocol_version >= 28
1259                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1260                  : S_ISREG(st.st_mode)) {
1261                         tmp_dev = (int64)st.st_dev;
1262                         tmp_ino = (int64)st.st_ino;
1263                 } else
1264                         tmp_dev = -1;
1265         }
1266 #endif
1267
1268 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1269         if (IS_DEVICE(st.st_mode)) {
1270                 tmp_rdev = st.st_rdev;
1271                 st.st_size = 0;
1272         } else if (IS_SPECIAL(st.st_mode))
1273                 st.st_size = 0;
1274 #endif
1275
1276         file->flags = flags;
1277         file->modtime = st.st_mtime;
1278         file->len32 = (uint32)st.st_size;
1279 #if SIZEOF_CAPITAL_OFF_T >= 8
1280         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1281                 file->flags |= FLAG_LENGTH64;
1282                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1283         }
1284 #endif
1285         file->mode = st.st_mode;
1286         if (preserve_uid)
1287                 F_OWNER(file) = st.st_uid;
1288         if (preserve_gid)
1289                 F_GROUP(file) = st.st_gid;
1290         if (am_generator && st.st_uid == our_uid)
1291                 file->flags |= FLAG_OWNED_BY_US;
1292
1293         if (basename != thisname)
1294                 file->dirname = lastdir;
1295
1296 #ifdef SUPPORT_LINKS
1297         if (linkname_len)
1298                 memcpy(bp + basename_len, linkname, linkname_len);
1299 #endif
1300
1301         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1302                 file_checksum(thisname, tmp_sum, st.st_size);
1303
1304         if (am_sender)
1305                 F_PATHNAME(file) = pathname;
1306         else if (!pool)
1307                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1308
1309         if (basename_len == 0+1) {
1310                 if (!pool)
1311                         unmake_file(file);
1312                 return NULL;
1313         }
1314
1315         if (unsort_ndx)
1316                 F_NDX(file) = dir_count;
1317
1318         return file;
1319 }
1320
1321 /* Only called for temporary file_struct entries created by make_file(). */
1322 void unmake_file(struct file_struct *file)
1323 {
1324         free(REQ_EXTRA(file, F_DEPTH(file)));
1325 }
1326
1327 static struct file_struct *send_file_name(int f, struct file_list *flist,
1328                                           const char *fname, STRUCT_STAT *stp,
1329                                           int flags, int filter_level)
1330 {
1331         struct file_struct *file;
1332
1333         file = make_file(fname, flist, stp, flags, filter_level);
1334         if (!file)
1335                 return NULL;
1336
1337         if (chmod_modes && !S_ISLNK(file->mode))
1338                 file->mode = tweak_mode(file->mode, chmod_modes);
1339
1340         if (f >= 0) {
1341                 char fbuf[MAXPATHLEN];
1342 #ifdef SUPPORT_LINKS
1343                 const char *symlink_name;
1344                 int symlink_len;
1345 #ifdef ICONV_OPTION
1346                 char symlink_buf[MAXPATHLEN];
1347 #endif
1348 #endif
1349 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1350                 stat_x sx;
1351 #endif
1352
1353 #ifdef SUPPORT_LINKS
1354                 if (preserve_links && S_ISLNK(file->mode)) {
1355                         symlink_name = F_SYMLINK(file);
1356                         symlink_len = strlen(symlink_name);
1357                         if (symlink_len == 0) {
1358                                 io_error |= IOERR_GENERAL;
1359                                 f_name(file, fbuf);
1360                                 rprintf(FERROR_XFER,
1361                                     "skipping symlink with 0-length value: %s\n",
1362                                     full_fname(fbuf));
1363                                 return NULL;
1364                         }
1365                 } else {
1366                         symlink_name = NULL;
1367                         symlink_len = 0;
1368                 }
1369 #endif
1370
1371 #ifdef ICONV_OPTION
1372                 if (ic_send != (iconv_t)-1) {
1373                         xbuf outbuf, inbuf;
1374
1375                         INIT_CONST_XBUF(outbuf, fbuf);
1376
1377                         if (file->dirname) {
1378                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1379                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1380                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1381                                         goto convert_error;
1382                                 outbuf.size += 2;
1383                                 fbuf[outbuf.len++] = '/';
1384                         }
1385
1386                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1387                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1388                           convert_error:
1389                                 io_error |= IOERR_GENERAL;
1390                                 rprintf(FERROR_XFER,
1391                                     "[%s] cannot convert filename: %s (%s)\n",
1392                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1393                                 return NULL;
1394                         }
1395                         fbuf[outbuf.len] = '\0';
1396
1397 #ifdef SUPPORT_LINKS
1398                         if (symlink_len && sender_symlink_iconv) {
1399                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1400                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1401                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1402                                         io_error |= IOERR_GENERAL;
1403                                         f_name(file, fbuf);
1404                                         rprintf(FERROR_XFER,
1405                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1406                                             who_am_i(), full_fname(fbuf), strerror(errno));
1407                                         return NULL;
1408                                 }
1409                                 symlink_buf[outbuf.len] = '\0';
1410
1411                                 symlink_name = symlink_buf;
1412                                 symlink_len = outbuf.len;
1413                         }
1414 #endif
1415                 } else
1416 #endif
1417                         f_name(file, fbuf);
1418
1419 #ifdef SUPPORT_ACLS
1420                 if (preserve_acls && !S_ISLNK(file->mode)) {
1421                         sx.st.st_mode = file->mode;
1422                         sx.acc_acl = sx.def_acl = NULL;
1423                         if (get_acl(fname, &sx) < 0) {
1424                                 io_error |= IOERR_GENERAL;
1425                                 return NULL;
1426                         }
1427                 }
1428 #endif
1429 #ifdef SUPPORT_XATTRS
1430                 if (preserve_xattrs) {
1431                         sx.st.st_mode = file->mode;
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(f, &sx);
1449                         free_acl(&sx);
1450                 }
1451 #endif
1452 #ifdef SUPPORT_XATTRS
1453                 if (preserve_xattrs) {
1454                         F_XATTR(file) = send_xattr(f, &sx);
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                 unsigned name_len;
1650                 char *dname = d_name(di);
1651                 if (dname[0] == '.' && (dname[1] == '\0'
1652                     || (dname[1] == '.' && dname[2] == '\0')))
1653                         continue;
1654                 name_len = strlcpy(p, dname, remainder);
1655                 if (name_len >= remainder) {
1656                         char save = fbuf[len];
1657                         fbuf[len] = '\0';
1658                         io_error |= IOERR_GENERAL;
1659                         rprintf(FERROR_XFER,
1660                                 "filename overflows max-path len by %u: %s/%s\n",
1661                                 name_len - remainder + 1, fbuf, dname);
1662                         fbuf[len] = save;
1663                         continue;
1664                 }
1665                 if (dname[0] == '\0') {
1666                         io_error |= IOERR_GENERAL;
1667                         rprintf(FERROR_XFER,
1668                                 "cannot send file with empty name in %s\n",
1669                                 full_fname(fbuf));
1670                         continue;
1671                 }
1672
1673                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1674         }
1675
1676         fbuf[len] = '\0';
1677
1678         if (errno) {
1679                 io_error |= IOERR_GENERAL;
1680                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1681         }
1682
1683         closedir(d);
1684
1685         if (f >= 0 && recurse && !divert_dirs) {
1686                 int i, end = flist->used - 1;
1687                 /* send_if_directory() bumps flist->used, so use "end". */
1688                 for (i = start; i <= end; i++)
1689                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1690         }
1691 }
1692
1693 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1694                               char *start, char *limit, int flags, char name_type)
1695 {
1696         static char lastpath[MAXPATHLEN] = "";
1697         static int lastpath_len = 0;
1698         static struct file_struct *lastpath_struct = NULL;
1699         struct file_struct *file;
1700         item_list *relname_list;
1701         relnamecache **rnpp;
1702         int len, need_new_dir, depth = 0;
1703         struct filter_list_struct save_filter_list = filter_list;
1704
1705         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1706         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1707
1708         if (inc_recurse) {
1709                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1710                  && lastpath_len == limit - fname
1711                  && strncmp(lastpath, fname, lastpath_len) == 0)
1712                         need_new_dir = 0;
1713                 else
1714                         need_new_dir = 1;
1715         } else {
1716                 char *tp = fname, *lp = lastpath;
1717                 /* Skip any initial directories in our path that we
1718                  * have in common with lastpath. */
1719                 assert(start == fname);
1720                 for ( ; ; tp++, lp++) {
1721                         if (tp == limit) {
1722                                 if (*lp == '/' || *lp == '\0')
1723                                         goto done;
1724                                 break;
1725                         }
1726                         if (*lp != *tp)
1727                                 break;
1728                         if (*tp == '/') {
1729                                 start = tp;
1730                                 depth++;
1731                         }
1732                 }
1733                 need_new_dir = 1;
1734         }
1735
1736         if (need_new_dir) {
1737                 int save_copy_links = copy_links;
1738                 int save_xfer_dirs = xfer_dirs;
1739                 char *slash;
1740
1741                 copy_links = xfer_dirs = 1;
1742
1743                 *limit = '\0';
1744
1745                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1746                         *slash = '\0';
1747                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1748                         depth++;
1749                         if (!inc_recurse && file && S_ISDIR(file->mode))
1750                                 change_local_filter_dir(fname, strlen(fname), depth);
1751                         *slash = '/';
1752                 }
1753
1754                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1755                 if (inc_recurse) {
1756                         if (file && !S_ISDIR(file->mode))
1757                                 file = NULL;
1758                         lastpath_struct = file;
1759                 } else if (file && S_ISDIR(file->mode))
1760                         change_local_filter_dir(fname, strlen(fname), ++depth);
1761
1762                 strlcpy(lastpath, fname, sizeof lastpath);
1763                 lastpath_len = limit - fname;
1764
1765                 *limit = '/';
1766
1767                 copy_links = save_copy_links;
1768                 xfer_dirs = save_xfer_dirs;
1769
1770                 if (!inc_recurse)
1771                         goto done;
1772         }
1773
1774         if (!lastpath_struct)
1775                 goto done; /* dir must have vanished */
1776
1777         len = strlen(limit+1);
1778         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1779         if (!relname_list) {
1780                 if (!(relname_list = new0(item_list)))
1781                         out_of_memory("send_implied_dirs");
1782                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1783         }
1784         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1785         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1786                 out_of_memory("send_implied_dirs");
1787         (*rnpp)->name_type = name_type;
1788         strlcpy((*rnpp)->fname, limit+1, len + 1);
1789
1790 done:
1791         filter_list = save_filter_list;
1792 }
1793
1794 static NORETURN void fatal_unsafe_io_error(void)
1795 {
1796         /* This (sadly) can only happen when pushing data because
1797          * the sender does not know about what kind of delete
1798          * is in effect on the receiving side when pulling. */
1799         rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-during issue with a pre-3.0.7 receiver.\n");
1800         exit_cleanup(RERR_UNSUPPORTED);
1801 }
1802
1803 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1804 {
1805         char fbuf[MAXPATHLEN];
1806         item_list *relname_list;
1807         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1808         size_t j;
1809
1810         f_name(file, fbuf);
1811         dlen = strlen(fbuf);
1812
1813         if (!change_pathname(file, NULL, 0))
1814                 exit_cleanup(RERR_FILESELECT);
1815
1816         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1817
1818         if (file->flags & FLAG_CONTENT_DIR) {
1819                 if (one_file_system) {
1820                         STRUCT_STAT st;
1821                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1822                                 interpret_stat_error(fbuf, True);
1823                                 return;
1824                         }
1825                         filesystem_dev = st.st_dev;
1826                 }
1827                 send_directory(f, flist, fbuf, dlen, flags);
1828         }
1829
1830         if (!relative_paths)
1831                 return;
1832
1833         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1834         if (!relname_list)
1835                 return;
1836
1837         for (j = 0; j < relname_list->count; j++) {
1838                 char *slash;
1839                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1840                 char name_type = rnp->name_type;
1841
1842                 fbuf[dlen] = '/';
1843                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1844                 free(rnp);
1845                 if (len >= (int)sizeof fbuf)
1846                         continue; /* Impossible... */
1847
1848                 slash = strchr(fbuf+dlen+1, '/');
1849                 if (slash) {
1850                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1851                         continue;
1852                 }
1853
1854                 if (name_type != NORMAL_NAME) {
1855                         STRUCT_STAT st;
1856                         if (link_stat(fbuf, &st, 1) != 0) {
1857                                 interpret_stat_error(fbuf, True);
1858                                 continue;
1859                         }
1860                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1861                 } else
1862                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1863         }
1864
1865         free(relname_list);
1866 }
1867
1868 void send_extra_file_list(int f, int at_least)
1869 {
1870         struct file_list *flist;
1871         int64 start_write;
1872         uint16 prev_flags;
1873         int old_cnt, save_io_error = io_error;
1874
1875         if (flist_eof)
1876                 return;
1877
1878         /* Keep sending data until we have the requested number of
1879          * files in the upcoming file-lists. */
1880         old_cnt = cur_flist->used;
1881         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1882                 old_cnt += flist->used;
1883         while (file_total - old_cnt < at_least) {
1884                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1885                 int dir_ndx, dstart = dir_count;
1886                 const char *pathname = F_PATHNAME(file);
1887                 int32 *dp;
1888
1889                 flist = flist_new(0, "send_extra_file_list");
1890                 start_write = stats.total_written;
1891
1892                 if (unsort_ndx)
1893                         dir_ndx = F_NDX(file);
1894                 else
1895                         dir_ndx = send_dir_ndx;
1896                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1897                 flist->parent_ndx = dir_ndx;
1898
1899                 send1extra(f, file, flist);
1900                 prev_flags = file->flags;
1901                 dp = F_DIR_NODE_P(file);
1902
1903                 /* If there are any duplicate directory names that follow, we
1904                  * send all the dirs together in one file-list.  The dir_flist
1905                  * tree links all the child subdirs onto the last dup dir. */
1906                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1907                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1908                         send_dir_ndx = dir_ndx;
1909                         file = dir_flist->sorted[dir_ndx];
1910                         /* Try to avoid some duplicate scanning of identical dirs. */
1911                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1912                                 file->flags &= ~FLAG_CONTENT_DIR;
1913                         send1extra(f, file, flist);
1914                         prev_flags = file->flags;
1915                         dp = F_DIR_NODE_P(file);
1916                 }
1917
1918                 if (io_error == save_io_error || ignore_errors)
1919                         write_byte(f, 0);
1920                 else if (use_safe_inc_flist) {
1921                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1922                         write_varint(f, io_error);
1923                 } else {
1924                         if (delete_during)
1925                                 fatal_unsafe_io_error();
1926                         write_byte(f, 0);
1927                 }
1928
1929                 if (need_unsorted_flist) {
1930                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1931                                 out_of_memory("send_extra_file_list");
1932                         memcpy(flist->sorted, flist->files,
1933                                flist->used * sizeof (struct file_struct*));
1934                 } else
1935                         flist->sorted = flist->files;
1936
1937                 flist_sort_and_clean(flist, 0);
1938
1939                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1940                 flist_done_allocating(flist);
1941
1942                 file_total += flist->used;
1943                 stats.flist_size += stats.total_written - start_write;
1944                 stats.num_files += flist->used;
1945                 if (verbose > 3)
1946                         output_flist(flist);
1947
1948                 if (DIR_FIRST_CHILD(dp) >= 0) {
1949                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1950                         send_dir_depth++;
1951                 } else {
1952                         while (DIR_NEXT_SIBLING(dp) < 0) {
1953                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1954                                         write_ndx(f, NDX_FLIST_EOF);
1955                                         flist_eof = 1;
1956                                         change_local_filter_dir(NULL, 0, 0);
1957                                         goto finish;
1958                                 }
1959                                 send_dir_depth--;
1960                                 file = dir_flist->sorted[send_dir_ndx];
1961                                 dp = F_DIR_NODE_P(file);
1962                         }
1963                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1964                 }
1965         }
1966
1967   finish:
1968         if (io_error != save_io_error && !ignore_errors)
1969                 send_msg_int(MSG_IO_ERROR, io_error);
1970 }
1971
1972 struct file_list *send_file_list(int f, int argc, char *argv[])
1973 {
1974         static const char *lastdir;
1975         static int lastdir_len = -1;
1976         int len, dirlen;
1977         STRUCT_STAT st;
1978         char *p, *dir;
1979         struct file_list *flist;
1980         struct timeval start_tv, end_tv;
1981         int64 start_write;
1982         int use_ff_fd = 0;
1983         int disable_buffering;
1984         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1985         int reading_remotely = filesfrom_host != NULL;
1986         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1987 #ifdef ICONV_OPTION
1988                      | (filesfrom_convert ? RL_CONVERT : 0)
1989 #endif
1990                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1991         int implied_dot_dir = 0;
1992
1993         rprintf(FLOG, "building file list\n");
1994         if (show_filelist_p())
1995                 start_filelist_progress("building file list");
1996         else if (inc_recurse && verbose && !am_server)
1997                 rprintf(FCLIENT, "sending incremental file list\n");
1998
1999         start_write = stats.total_written;
2000         gettimeofday(&start_tv, NULL);
2001
2002         if (relative_paths && protocol_version >= 30)
2003                 implied_dirs = 1; /* We send flagged implied dirs */
2004
2005 #ifdef SUPPORT_HARD_LINKS
2006         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2007                 init_hard_links();
2008 #endif
2009
2010         flist = cur_flist = flist_new(0, "send_file_list");
2011         if (inc_recurse) {
2012                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2013                 flags |= FLAG_DIVERT_DIRS;
2014         } else
2015                 dir_flist = cur_flist;
2016
2017         disable_buffering = io_start_buffering_out(f);
2018         if (filesfrom_fd >= 0) {
2019                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2020                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2021                                 full_fname(argv[0]));
2022                         exit_cleanup(RERR_FILESELECT);
2023                 }
2024                 use_ff_fd = 1;
2025         }
2026
2027         if (!orig_dir)
2028                 orig_dir = strdup(curr_dir);
2029
2030         while (1) {
2031                 char fbuf[MAXPATHLEN], *fn, name_type;
2032
2033                 if (use_ff_fd) {
2034                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2035                                 break;
2036                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2037                 } else {
2038                         if (argc-- == 0)
2039                                 break;
2040                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2041                         if (sanitize_paths)
2042                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2043                 }
2044
2045                 len = strlen(fbuf);
2046                 if (relative_paths) {
2047                         /* We clean up fbuf below. */
2048                         name_type = NORMAL_NAME;
2049                 } else if (!len || fbuf[len - 1] == '/') {
2050                         if (len == 2 && fbuf[0] == '.') {
2051                                 /* Turn "./" into just "." rather than "./." */
2052                                 fbuf[--len] = '\0';
2053                         } else {
2054                                 if (len + 1 >= MAXPATHLEN)
2055                                         overflow_exit("send_file_list");
2056                                 fbuf[len++] = '.';
2057                                 fbuf[len] = '\0';
2058                         }
2059                         name_type = DOTDIR_NAME;
2060                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2061                     && (len == 2 || fbuf[len-3] == '/')) {
2062                         if (len + 2 >= MAXPATHLEN)
2063                                 overflow_exit("send_file_list");
2064                         fbuf[len++] = '/';
2065                         fbuf[len++] = '.';
2066                         fbuf[len] = '\0';
2067                         name_type = DOTDIR_NAME;
2068                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2069                         name_type = DOTDIR_NAME;
2070                 else
2071                         name_type = NORMAL_NAME;
2072
2073                 dir = NULL;
2074
2075                 if (!relative_paths) {
2076                         p = strrchr(fbuf, '/');
2077                         if (p) {
2078                                 *p = '\0';
2079                                 if (p == fbuf)
2080                                         dir = "/";
2081                                 else
2082                                         dir = fbuf;
2083                                 len -= p - fbuf + 1;
2084                                 fn = p + 1;
2085                         } else
2086                                 fn = fbuf;
2087                 } else {
2088                         if ((p = strstr(fbuf, "/./")) != NULL) {
2089                                 *p = '\0';
2090                                 if (p == fbuf)
2091                                         dir = "/";
2092                                 else {
2093                                         dir = fbuf;
2094                                         clean_fname(dir, 0);
2095                                 }
2096                                 fn = p + 3;
2097                                 while (*fn == '/')
2098                                         fn++;
2099                                 if (!*fn)
2100                                         *--fn = '\0'; /* ensure room for '.' */
2101                         } else
2102                                 fn = fbuf;
2103                         /* A leading ./ can be used in relative mode to affect
2104                          * the dest dir without its name being in the path. */
2105                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2106                                 send_file_name(f, flist, ".", NULL,
2107                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2108                                     ALL_FILTERS);
2109                                 implied_dot_dir = 1;
2110                         }
2111                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2112                                             | CFN_DROP_TRAILING_DOT_DIR);
2113                         if (len == 1) {
2114                                 if (fn[0] == '/') {
2115                                         fn = "/.";
2116                                         len = 2;
2117                                         name_type = DOTDIR_NAME;
2118                                 } else if (fn[0] == '.')
2119                                         name_type = DOTDIR_NAME;
2120                         } else if (fn[len-1] == '/') {
2121                                 fn[--len] = '\0';
2122                                 if (len == 1 && *fn == '.')
2123                                         name_type = DOTDIR_NAME;
2124                                 else
2125                                         name_type = SLASH_ENDING_NAME;
2126                         }
2127                         /* Reject a ".." dir in the active part of the path. */
2128                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2129                                 if ((p[2] == '/' || p[2] == '\0')
2130                                  && (p == fn || p[-1] == '/')) {
2131                                         rprintf(FERROR,
2132                                             "found \"..\" dir in relative path: %s\n",
2133                                             fn);
2134                                         exit_cleanup(RERR_SYNTAX);
2135                                 }
2136                         }
2137                 }
2138
2139                 if (!*fn) {
2140                         len = 1;
2141                         fn = ".";
2142                         name_type = DOTDIR_NAME;
2143                 }
2144
2145                 dirlen = dir ? strlen(dir) : 0;
2146                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2147                         if (!change_pathname(NULL, dir, -dirlen))
2148                                 continue;
2149                         lastdir = pathname;
2150                         lastdir_len = pathname_len;
2151                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2152                         continue;
2153
2154                 if (fn != fbuf)
2155                         memmove(fbuf, fn, len + 1);
2156
2157                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2158                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2159                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2160                         io_error |= IOERR_GENERAL;
2161                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2162                                 full_fname(fbuf));
2163                         continue;
2164                 }
2165
2166                 /* A dot-dir should not be excluded! */
2167                 if (name_type != DOTDIR_NAME
2168                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2169                         continue;
2170
2171                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2172                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2173                         continue;
2174                 }
2175
2176                 if (inc_recurse && relative_paths && *fbuf) {
2177                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2178                                 if (p - fbuf == 1 && *fbuf == '.') {
2179                                         if ((fn = strchr(p+1, '/')) != NULL)
2180                                                 p = fn;
2181                                 } else
2182                                         fn = p;
2183                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2184                                 if (fn == p)
2185                                         continue;
2186                         }
2187                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2188                         /* Send the implied directories at the start of the
2189                          * source spec, so we get their permissions right. */
2190                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2191                 }
2192
2193                 if (one_file_system)
2194                         filesystem_dev = st.st_dev;
2195
2196                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2197                         struct file_struct *file;
2198                         file = send_file_name(f, flist, fbuf, &st,
2199                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2200                                               NO_FILTERS);
2201                         if (!file)
2202                                 continue;
2203                         if (inc_recurse) {
2204                                 if (name_type == DOTDIR_NAME) {
2205                                         if (send_dir_depth < 0) {
2206                                                 send_dir_depth = 0;
2207                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2208                                         }
2209                                         send_directory(f, flist, fbuf, len, flags);
2210                                 }
2211                         } else
2212                                 send_if_directory(f, flist, file, fbuf, len, flags);
2213                 } else
2214                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2215         }
2216
2217         gettimeofday(&end_tv, NULL);
2218         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2219                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2220         if (stats.flist_buildtime == 0)
2221                 stats.flist_buildtime = 1;
2222         start_tv = end_tv;
2223
2224         /* Indicate end of file list */
2225         if (io_error == 0 || ignore_errors)
2226                 write_byte(f, 0);
2227         else if (use_safe_inc_flist) {
2228                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2229                 write_varint(f, io_error);
2230         } else {
2231                 if (delete_during && inc_recurse)
2232                         fatal_unsafe_io_error();
2233                 write_byte(f, 0);
2234         }
2235
2236 #ifdef SUPPORT_HARD_LINKS
2237         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2238                 idev_destroy();
2239 #endif
2240
2241         if (show_filelist_p())
2242                 finish_filelist_progress(flist);
2243
2244         gettimeofday(&end_tv, NULL);
2245         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2246                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2247
2248         /* When converting names, both sides keep an unsorted file-list array
2249          * because the names will differ on the sending and receiving sides
2250          * (both sides will use the unsorted index number for each item). */
2251
2252         /* Sort the list without removing any duplicates.  This allows the
2253          * receiving side to ask for whatever name it kept.  For incremental
2254          * recursion mode, the sender marks duplicate dirs so that it can
2255          * send them together in a single file-list. */
2256         if (need_unsorted_flist) {
2257                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2258                         out_of_memory("send_file_list");
2259                 memcpy(flist->sorted, flist->files,
2260                        flist->used * sizeof (struct file_struct*));
2261         } else
2262                 flist->sorted = flist->files;
2263         flist_sort_and_clean(flist, 0);
2264         file_total += flist->used;
2265
2266         if (numeric_ids <= 0 && !inc_recurse)
2267                 send_id_list(f);
2268
2269         set_msg_fd_in(-1);
2270
2271         /* send the io_error flag */
2272         if (protocol_version < 30)
2273                 write_int(f, ignore_errors ? 0 : io_error);
2274         else if (!use_safe_inc_flist && io_error && !ignore_errors)
2275                 send_msg_int(MSG_IO_ERROR, io_error);
2276
2277         if (disable_buffering)
2278                 io_end_buffering_out();
2279
2280         stats.flist_size = stats.total_written - start_write;
2281         stats.num_files = flist->used;
2282
2283         if (verbose > 3)
2284                 output_flist(flist);
2285
2286         if (verbose > 2)
2287                 rprintf(FINFO, "send_file_list done\n");
2288
2289         if (inc_recurse) {
2290                 send_dir_depth = 1;
2291                 add_dirs_to_tree(-1, flist, dir_count);
2292                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2293                         flist->parent_ndx = -1;
2294                 flist_done_allocating(flist);
2295                 if (send_dir_ndx < 0) {
2296                         write_ndx(f, NDX_FLIST_EOF);
2297                         flist_eof = 1;
2298                 }
2299                 else if (file_total == 1) {
2300                         /* If we're creating incremental file-lists and there
2301                          * was just 1 item in the first file-list, send 1 more
2302                          * file-list to check if this is a 1-file xfer. */
2303                         send_extra_file_list(f, 1);
2304                 }
2305         }
2306
2307         return flist;
2308 }
2309
2310 struct file_list *recv_file_list(int f)
2311 {
2312         struct file_list *flist;
2313         int dstart, flags;
2314         int64 start_read;
2315         int save_verbose = verbose;
2316
2317         if (!first_flist)
2318                 rprintf(FLOG, "receiving file list\n");
2319         if (show_filelist_p())
2320                 start_filelist_progress("receiving file list");
2321         else if (inc_recurse && verbose && !am_server && !first_flist)
2322                 rprintf(FCLIENT, "receiving incremental file list\n");
2323
2324         start_read = stats.total_read;
2325
2326 #ifdef SUPPORT_HARD_LINKS
2327         if (preserve_hard_links && !first_flist)
2328                 init_hard_links();
2329 #endif
2330
2331         flist = flist_new(0, "recv_file_list");
2332
2333         if (inc_recurse) {
2334                 if (flist->ndx_start == 1)
2335                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2336                 dstart = dir_flist->used;
2337         } else {
2338                 dir_flist = flist;
2339                 dstart = 0;
2340         }
2341
2342         if (am_server && verbose > 2)
2343                 verbose = 2;
2344         while ((flags = read_byte(f)) != 0) {
2345                 struct file_struct *file;
2346
2347                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2348                         flags |= read_byte(f) << 8;
2349
2350                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2351                         int err;
2352                         if (!use_safe_inc_flist) {
2353                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2354                                 exit_cleanup(RERR_PROTOCOL);
2355                         }
2356                         err = read_varint(f);
2357                         if (!ignore_errors)
2358                                 io_error |= err;
2359                         break;
2360                 }
2361
2362                 flist_expand(flist, 1);
2363                 file = recv_file_entry(f, flist, flags);
2364
2365                 if (inc_recurse && S_ISDIR(file->mode)) {
2366                         flist_expand(dir_flist, 1);
2367                         dir_flist->files[dir_flist->used++] = file;
2368                 }
2369
2370                 flist->files[flist->used++] = file;
2371
2372                 maybe_emit_filelist_progress(flist->used);
2373
2374                 if (verbose > 2) {
2375                         char *name = f_name(file, NULL);
2376                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2377                 }
2378         }
2379         file_total += flist->used;
2380         verbose = save_verbose;
2381
2382         if (verbose > 2)
2383                 rprintf(FINFO, "received %d names\n", flist->used);
2384
2385         if (show_filelist_p())
2386                 finish_filelist_progress(flist);
2387
2388         if (need_unsorted_flist) {
2389                 /* Create an extra array of index pointers that we can sort for
2390                  * the generator's use (for wading through the files in sorted
2391                  * order and for calling flist_find()).  We keep the "files"
2392                  * list unsorted for our exchange of index numbers with the
2393                  * other side (since their names may not sort the same). */
2394                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2395                         out_of_memory("recv_file_list");
2396                 memcpy(flist->sorted, flist->files,
2397                        flist->used * sizeof (struct file_struct*));
2398                 if (inc_recurse && dir_flist->used > dstart) {
2399                         static int dir_flist_malloced = 0;
2400                         if (dir_flist_malloced < dir_flist->malloced) {
2401                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2402                                                         struct file_struct *,
2403                                                         dir_flist->malloced);
2404                                 dir_flist_malloced = dir_flist->malloced;
2405                         }
2406                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2407                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2408                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2409                 }
2410         } else {
2411                 flist->sorted = flist->files;
2412                 if (inc_recurse && dir_flist->used > dstart) {
2413                         dir_flist->sorted = dir_flist->files;
2414                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2415                 }
2416         }
2417
2418         if (inc_recurse)
2419                 flist_done_allocating(flist);
2420         else if (f >= 0)
2421                 recv_id_list(f, flist);
2422
2423         flist_sort_and_clean(flist, relative_paths);
2424
2425         if (protocol_version < 30) {
2426                 /* Recv the io_error flag */
2427                 if (ignore_errors)
2428                         read_int(f);
2429                 else
2430                         io_error |= read_int(f);
2431         } else if (inc_recurse && flist->ndx_start == 1) {
2432                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2433                         flist->parent_ndx = -1;
2434         }
2435
2436         if (verbose > 3)
2437                 output_flist(flist);
2438
2439         if (verbose > 2)
2440                 rprintf(FINFO, "recv_file_list done\n");
2441
2442         stats.flist_size += stats.total_read - start_read;
2443         stats.num_files += flist->used;
2444
2445         return flist;
2446 }
2447
2448 /* This is only used once by the receiver if the very first file-list
2449  * has exactly one item in it. */
2450 void recv_additional_file_list(int f)
2451 {
2452         struct file_list *flist;
2453         int ndx = read_ndx(f);
2454         if (ndx == NDX_FLIST_EOF) {
2455                 flist_eof = 1;
2456                 change_local_filter_dir(NULL, 0, 0);
2457         } else {
2458                 ndx = NDX_FLIST_OFFSET - ndx;
2459                 if (ndx < 0 || ndx >= dir_flist->used) {
2460                         ndx = NDX_FLIST_OFFSET - ndx;
2461                         rprintf(FERROR,
2462                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2463                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2464                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2465                         exit_cleanup(RERR_PROTOCOL);
2466                 }
2467                 if (verbose > 3) {
2468                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2469                                 who_am_i(), ndx);
2470                 }
2471                 flist = recv_file_list(f);
2472                 flist->parent_ndx = ndx;
2473         }
2474 }
2475
2476 /* Search for an identically-named item in the file list.  Note that the
2477  * items must agree in their directory-ness, or no match is returned. */
2478 int flist_find(struct file_list *flist, struct file_struct *f)
2479 {
2480         int low = flist->low, high = flist->high;
2481         int diff, mid, mid_up;
2482
2483         while (low <= high) {
2484                 mid = (low + high) / 2;
2485                 if (F_IS_ACTIVE(flist->sorted[mid]))
2486                         mid_up = mid;
2487                 else {
2488                         /* Scan for the next non-empty entry using the cached
2489                          * distance values.  If the value isn't fully up-to-
2490                          * date, update it. */
2491                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2492                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2493                                 do {
2494                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2495                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2496                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2497                         }
2498                         if (mid_up > high) {
2499                                 /* If there's nothing left above us, set high to
2500                                  * a non-empty entry below us and continue. */
2501                                 high = mid - (int)flist->sorted[mid]->len32;
2502                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2503                                         do {
2504                                             high -= (int)flist->sorted[high]->len32;
2505                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2506                                         flist->sorted[mid]->len32 = mid - high;
2507                                 }
2508                                 continue;
2509                         }
2510                 }
2511                 diff = f_name_cmp(flist->sorted[mid_up], f);
2512                 if (diff == 0) {
2513                         if (protocol_version < 29
2514                             && S_ISDIR(flist->sorted[mid_up]->mode)
2515                             != S_ISDIR(f->mode))
2516                                 return -1;
2517                         return mid_up;
2518                 }
2519                 if (diff < 0)
2520                         low = mid_up + 1;
2521                 else
2522                         high = mid - 1;
2523         }
2524         return -1;
2525 }
2526
2527 /* Search for an identically-named item in the file list.  Differs from
2528  * flist_find in that an item that agrees with "f" in directory-ness is
2529  * preferred but one that does not is still found. */
2530 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2531 {
2532         mode_t save_mode;
2533         int ndx;
2534
2535         /* First look for an item that agrees in directory-ness. */
2536         ndx = flist_find(flist, f);
2537         if (ndx >= 0)
2538                 return ndx;
2539
2540         /* Temporarily flip f->mode to look for an item of opposite
2541          * directory-ness. */
2542         save_mode = f->mode;
2543         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2544         ndx = flist_find(flist, f);
2545         f->mode = save_mode;
2546         return ndx;
2547 }
2548
2549 /*
2550  * Free up any resources a file_struct has allocated
2551  * and clear the file.
2552  */
2553 void clear_file(struct file_struct *file)
2554 {
2555         /* The +1 zeros out the first char of the basename. */
2556         memset(file, 0, FILE_STRUCT_LEN + 1);
2557         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2558          * entry.  Likewise for len32 in the opposite direction.  We assume
2559          * that we're alone for now since flist_find() will adjust the counts
2560          * it runs into that aren't up-to-date. */
2561         file->len32 = F_DEPTH(file) = 1;
2562 }
2563
2564 /* Allocate a new file list. */
2565 struct file_list *flist_new(int flags, char *msg)
2566 {
2567         struct file_list *flist;
2568
2569         if (!(flist = new0(struct file_list)))
2570                 out_of_memory(msg);
2571
2572         if (flags & FLIST_TEMP) {
2573                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2574                                                 out_of_memory, POOL_INTERN)))
2575                         out_of_memory(msg);
2576         } else {
2577                 /* This is a doubly linked list with prev looping back to
2578                  * the end of the list, but the last next pointer is NULL. */
2579                 if (!first_flist) {
2580                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2581                                                 out_of_memory, POOL_INTERN);
2582                         if (!flist->file_pool)
2583                                 out_of_memory(msg);
2584
2585                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2586
2587                         first_flist = cur_flist = flist->prev = flist;
2588                 } else {
2589                         struct file_list *prev = first_flist->prev;
2590
2591                         flist->file_pool = first_flist->file_pool;
2592
2593                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2594                         flist->flist_num = prev->flist_num + 1;
2595
2596                         flist->prev = prev;
2597                         prev->next = first_flist->prev = flist;
2598                 }
2599                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2600                 flist_cnt++;
2601         }
2602
2603         return flist;
2604 }
2605
2606 /* Free up all elements in a flist. */
2607 void flist_free(struct file_list *flist)
2608 {
2609         if (!flist->prev) {
2610                 /* Was FLIST_TEMP dir-list. */
2611         } else if (flist == flist->prev) {
2612                 first_flist = cur_flist = NULL;
2613                 file_total = 0;
2614                 flist_cnt = 0;
2615         } else {
2616                 if (flist == cur_flist)
2617                         cur_flist = flist->next;
2618                 if (flist == first_flist)
2619                         first_flist = first_flist->next;
2620                 else {
2621                         flist->prev->next = flist->next;
2622                         if (!flist->next)
2623                                 flist->next = first_flist;
2624                 }
2625                 flist->next->prev = flist->prev;
2626                 file_total -= flist->used;
2627                 flist_cnt--;
2628         }
2629
2630         if (!flist->prev || !flist_cnt)
2631                 pool_destroy(flist->file_pool);
2632         else
2633                 pool_free_old(flist->file_pool, flist->pool_boundary);
2634
2635         if (flist->sorted && flist->sorted != flist->files)
2636                 free(flist->sorted);
2637         free(flist->files);
2638         free(flist);
2639 }
2640
2641 /* This routine ensures we don't have any duplicate names in our file list.
2642  * duplicate names can cause corruption because of the pipelining. */
2643 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2644 {
2645         char fbuf[MAXPATHLEN];
2646         int i, prev_i;
2647
2648         if (!flist)
2649                 return;
2650         if (flist->used == 0) {
2651                 flist->high = -1;
2652                 flist->low = 0;
2653                 return;
2654         }
2655
2656         fsort(flist->sorted, flist->used);
2657
2658         if (!am_sender || inc_recurse) {
2659                 for (i = prev_i = 0; i < flist->used; i++) {
2660                         if (F_IS_ACTIVE(flist->sorted[i])) {
2661                                 prev_i = i;
2662                                 break;
2663                         }
2664                 }
2665                 flist->low = prev_i;
2666         } else {
2667                 i = prev_i = flist->used - 1;
2668                 flist->low = 0;
2669         }
2670
2671         while (++i < flist->used) {
2672                 int j;
2673                 struct file_struct *file = flist->sorted[i];
2674
2675                 if (!F_IS_ACTIVE(file))
2676                         continue;
2677                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2678                         j = prev_i;
2679                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2680                         int save_mode = file->mode;
2681                         /* Make sure that this directory doesn't duplicate a
2682                          * non-directory earlier in the list. */
2683                         flist->high = prev_i;
2684                         file->mode = S_IFREG;
2685                         j = flist_find(flist, file);
2686                         file->mode = save_mode;
2687                 } else
2688                         j = -1;
2689                 if (j >= 0) {
2690                         int keep, drop;
2691                         /* If one is a dir and the other is not, we want to
2692                          * keep the dir because it might have contents in the
2693                          * list.  Otherwise keep the first one. */
2694                         if (S_ISDIR(file->mode)) {
2695                                 struct file_struct *fp = flist->sorted[j];
2696                                 if (!S_ISDIR(fp->mode))
2697                                         keep = i, drop = j;
2698                                 else {
2699                                         if (am_sender)
2700                                                 file->flags |= FLAG_DUPLICATE;
2701                                         else { /* Make sure we merge our vital flags. */
2702                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2703                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2704                                         }
2705                                         keep = j, drop = i;
2706                                 }
2707                         } else
2708                                 keep = j, drop = i;
2709
2710                         if (!am_sender) {
2711                                 if (verbose > 1) {
2712                                         rprintf(FINFO,
2713                                             "removing duplicate name %s from file list (%d)\n",
2714                                             f_name(file, fbuf), drop + flist->ndx_start);
2715                                 }
2716                                 clear_file(flist->sorted[drop]);
2717                         }
2718
2719                         if (keep == i) {
2720                                 if (flist->low == drop) {
2721                                         for (j = drop + 1;
2722                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2723                                              j++) {}
2724                                         flist->low = j;
2725                                 }
2726                                 prev_i = i;
2727                         }
2728                 } else
2729                         prev_i = i;
2730         }
2731         flist->high = prev_i;
2732
2733         if (strip_root) {
2734                 /* We need to strip off the leading slashes for relative
2735                  * paths, but this must be done _after_ the sorting phase. */
2736                 for (i = flist->low; i <= flist->high; i++) {
2737                         struct file_struct *file = flist->sorted[i];
2738
2739                         if (!file->dirname)
2740                                 continue;
2741                         while (*file->dirname == '/')
2742                                 file->dirname++;
2743                         if (!*file->dirname)
2744                                 file->dirname = NULL;
2745                 }
2746         }
2747
2748         if (prune_empty_dirs && !am_sender) {
2749                 int j, prev_depth = 0;
2750
2751                 prev_i = 0; /* It's OK that this isn't really true. */
2752
2753                 for (i = flist->low; i <= flist->high; i++) {
2754                         struct file_struct *fp, *file = flist->sorted[i];
2755
2756                         /* This temporarily abuses the F_DEPTH() value for a
2757                          * directory that is in a chain that might get pruned.
2758                          * We restore the old value if it gets a reprieve. */
2759                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2760                                 /* Dump empty dirs when coming back down. */
2761                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2762                                         fp = flist->sorted[prev_i];
2763                                         if (F_DEPTH(fp) >= 0)
2764                                                 break;
2765                                         prev_i = -F_DEPTH(fp)-1;
2766                                         clear_file(fp);
2767                                 }
2768                                 prev_depth = F_DEPTH(file);
2769                                 if (is_excluded(f_name(file, fbuf), 1,
2770                                                        ALL_FILTERS)) {
2771                                         /* Keep dirs through this dir. */
2772                                         for (j = prev_depth-1; ; j--) {
2773                                                 fp = flist->sorted[prev_i];
2774                                                 if (F_DEPTH(fp) >= 0)
2775                                                         break;
2776                                                 prev_i = -F_DEPTH(fp)-1;
2777                                                 F_DEPTH(fp) = j;
2778                                         }
2779                                 } else
2780                                         F_DEPTH(file) = -prev_i-1;
2781                                 prev_i = i;
2782                         } else {
2783                                 /* Keep dirs through this non-dir. */
2784                                 for (j = prev_depth; ; j--) {
2785                                         fp = flist->sorted[prev_i];
2786                                         if (F_DEPTH(fp) >= 0)
2787                                                 break;
2788                                         prev_i = -F_DEPTH(fp)-1;
2789                                         F_DEPTH(fp) = j;
2790                                 }
2791                         }
2792                 }
2793                 /* Dump all remaining empty dirs. */
2794                 while (1) {
2795                         struct file_struct *fp = flist->sorted[prev_i];
2796                         if (F_DEPTH(fp) >= 0)
2797                                 break;
2798                         prev_i = -F_DEPTH(fp)-1;
2799                         clear_file(fp);
2800                 }
2801
2802                 for (i = flist->low; i <= flist->high; i++) {
2803                         if (F_IS_ACTIVE(flist->sorted[i]))
2804                                 break;
2805                 }
2806                 flist->low = i;
2807                 for (i = flist->high; i >= flist->low; i--) {
2808                         if (F_IS_ACTIVE(flist->sorted[i]))
2809                                 break;
2810                 }
2811                 flist->high = i;
2812         }
2813 }
2814
2815 static void output_flist(struct file_list *flist)
2816 {
2817         char uidbuf[16], gidbuf[16], depthbuf[16];
2818         struct file_struct *file;
2819         const char *root, *dir, *slash, *name, *trail;
2820         const char *who = who_am_i();
2821         int i;
2822
2823         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2824                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2825         for (i = 0; i < flist->used; i++) {
2826                 file = flist->files[i];
2827                 if ((am_root || am_sender) && uid_ndx) {
2828                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2829                                  F_OWNER(file));
2830                 } else
2831                         *uidbuf = '\0';
2832                 if (gid_ndx) {
2833                         static char parens[] = "(\0)\0\0\0";
2834                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2835                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2836                                  pp, F_GROUP(file), pp + 2);
2837                 } else
2838                         *gidbuf = '\0';
2839                 if (!am_sender)
2840                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2841                 if (F_IS_ACTIVE(file)) {
2842                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2843                         if ((dir = file->dirname) == NULL)
2844                                 dir = slash = "";
2845                         else
2846                                 slash = "/";
2847                         name = file->basename;
2848                         trail = S_ISDIR(file->mode) ? "/" : "";
2849                 } else
2850                         root = dir = slash = name = trail = "";
2851                 rprintf(FINFO,
2852                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2853                         who, i + flist->ndx_start,
2854                         root, dir, slash, name, trail,
2855                         (int)file->mode, (double)F_LENGTH(file),
2856                         uidbuf, gidbuf, file->flags);
2857         }
2858 }
2859
2860 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2861 enum fnc_type { t_PATH, t_ITEM };
2862
2863 static int found_prefix;
2864
2865 /* Compare the names of two file_struct entities, similar to how strcmp()
2866  * would do if it were operating on the joined strings.
2867  *
2868  * Some differences beginning with protocol_version 29: (1) directory names
2869  * are compared with an assumed trailing slash so that they compare in a
2870  * way that would cause them to sort immediately prior to any content they
2871  * may have; (2) a directory of any name compares after a non-directory of
2872  * any name at the same depth; (3) a directory with name "." compares prior
2873  * to anything else.  These changes mean that a directory and a non-dir
2874  * with the same name will not compare as equal (protocol_version >= 29).
2875  *
2876  * The dirname component can be an empty string, but the basename component
2877  * cannot (and never is in the current codebase).  The basename component
2878  * may be NULL (for a removed item), in which case it is considered to be
2879  * after any existing item. */
2880 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2881 {
2882         int dif;
2883         const uchar *c1, *c2;
2884         enum fnc_state state1, state2;
2885         enum fnc_type type1, type2;
2886         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2887
2888         if (!f1 || !F_IS_ACTIVE(f1)) {
2889                 if (!f2 || !F_IS_ACTIVE(f2))
2890                         return 0;
2891                 return -1;
2892         }
2893         if (!f2 || !F_IS_ACTIVE(f2))
2894                 return 1;
2895
2896         c1 = (uchar*)f1->dirname;
2897         c2 = (uchar*)f2->dirname;
2898         if (c1 == c2)
2899                 c1 = c2 = NULL;
2900         if (!c1) {
2901                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2902                 c1 = (const uchar*)f1->basename;
2903                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2904                         type1 = t_ITEM;
2905                         state1 = s_TRAILING;
2906                         c1 = (uchar*)"";
2907                 } else
2908                         state1 = s_BASE;
2909         } else {
2910                 type1 = t_path;
2911                 state1 = s_DIR;
2912         }
2913         if (!c2) {
2914                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2915                 c2 = (const uchar*)f2->basename;
2916                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2917                         type2 = t_ITEM;
2918                         state2 = s_TRAILING;
2919                         c2 = (uchar*)"";
2920                 } else
2921                         state2 = s_BASE;
2922         } else {
2923                 type2 = t_path;
2924                 state2 = s_DIR;
2925         }
2926
2927         if (type1 != type2)
2928                 return type1 == t_PATH ? 1 : -1;
2929
2930         do {
2931                 if (!*c1) {
2932                         switch (state1) {
2933                         case s_DIR:
2934                                 state1 = s_SLASH;
2935                                 c1 = (uchar*)"/";
2936                                 break;
2937                         case s_SLASH:
2938                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2939                                 c1 = (const uchar*)f1->basename;
2940                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2941                                         type1 = t_ITEM;
2942                                         state1 = s_TRAILING;
2943                                         c1 = (uchar*)"";
2944                                 } else
2945                                         state1 = s_BASE;
2946                                 break;
2947                         case s_BASE:
2948                                 state1 = s_TRAILING;
2949                                 if (type1 == t_PATH) {
2950                                         c1 = (uchar*)"/";
2951                                         break;
2952                                 }
2953                                 /* FALL THROUGH */
2954                         case s_TRAILING:
2955                                 type1 = t_ITEM;
2956                                 break;
2957                         }
2958                         if (*c2 && type1 != type2)
2959                                 return type1 == t_PATH ? 1 : -1;
2960                 }
2961                 if (!*c2) {
2962                         switch (state2) {
2963                         case s_DIR:
2964                                 state2 = s_SLASH;
2965                                 c2 = (uchar*)"/";
2966                                 break;
2967                         case s_SLASH:
2968                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2969                                 c2 = (const uchar*)f2->basename;
2970                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2971                                         type2 = t_ITEM;
2972                                         state2 = s_TRAILING;
2973                                         c2 = (uchar*)"";
2974                                 } else
2975                                         state2 = s_BASE;
2976                                 break;
2977                         case s_BASE:
2978                                 state2 = s_TRAILING;
2979                                 if (type2 == t_PATH) {
2980                                         c2 = (uchar*)"/";
2981                                         break;
2982                                 }
2983                                 /* FALL THROUGH */
2984                         case s_TRAILING:
2985                                 found_prefix = 1;
2986                                 if (!*c1)
2987                                         return 0;
2988                                 type2 = t_ITEM;
2989                                 break;
2990                         }
2991                         if (type1 != type2)
2992                                 return type1 == t_PATH ? 1 : -1;
2993                 }
2994         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2995
2996         return dif;
2997 }
2998
2999 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3000  * not match if f2's basename is not an exact match of a path element in f1.
3001  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3002 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3003 {
3004         found_prefix = 0;
3005         f_name_cmp(f1, f2);
3006         return found_prefix;
3007 }
3008
3009 char *f_name_buf(void)
3010 {
3011         static char names[5][MAXPATHLEN];
3012         static unsigned int n;
3013
3014         n = (n + 1) % (sizeof names / sizeof names[0]);
3015
3016         return names[n];
3017 }
3018
3019 /* Return a copy of the full filename of a flist entry, using the indicated
3020  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3021  * done because we checked the size when creating the file_struct entry.
3022  */
3023 char *f_name(const struct file_struct *f, char *fbuf)
3024 {
3025         if (!f || !F_IS_ACTIVE(f))
3026                 return NULL;
3027
3028         if (!fbuf)
3029                 fbuf = f_name_buf();
3030
3031         if (f->dirname) {
3032                 int len = strlen(f->dirname);
3033                 memcpy(fbuf, f->dirname, len);
3034                 fbuf[len] = '/';
3035                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3036         } else
3037                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3038
3039         return fbuf;
3040 }
3041
3042 /* Do a non-recursive scan of the named directory, possibly ignoring all
3043  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3044  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3045  * buffer (the functions we call will append names onto the end, but the old
3046  * dir value will be restored on exit). */
3047 struct file_list *get_dirlist(char *dirname, int dlen, int flags)
3048 {
3049         struct file_list *dirlist;
3050         char dirbuf[MAXPATHLEN];
3051         int save_recurse = recurse;
3052         int save_xfer_dirs = xfer_dirs;
3053         int save_prune_empty_dirs = prune_empty_dirs;
3054         int senddir_fd = flags & GDL_IGNORE_FILTER_RULES ? -2 : -1;
3055
3056         if (dlen < 0) {
3057                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3058                 if (dlen >= MAXPATHLEN)
3059                         return NULL;
3060                 dirname = dirbuf;
3061         }
3062
3063         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3064
3065         recurse = 0;
3066         xfer_dirs = 1;
3067         send_directory(senddir_fd, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3068         xfer_dirs = save_xfer_dirs;
3069         recurse = save_recurse;
3070         if (do_progress)
3071                 flist_count_offset += dirlist->used;
3072
3073         prune_empty_dirs = 0;
3074         dirlist->sorted = dirlist->files;
3075         flist_sort_and_clean(dirlist, 0);
3076         prune_empty_dirs = save_prune_empty_dirs;
3077
3078         if (verbose > 3)
3079                 output_flist(dirlist);
3080
3081         return dirlist;
3082 }