c7607f0365bfdf1476ac961477a3e7f91b5b4a43
[rsync.git] / flist.c
1 /*
2  * Generate and receive file lists.
3  *
4  * Copyright (C) 1996 Andrew Tridgell
5  * Copyright (C) 1996 Paul Mackerras
6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7  * Copyright (C) 2002-2007 Wayne Davison
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, visit the http://fsf.org website.
21  */
22
23 #include "rsync.h"
24 #include "rounding.h"
25 #include "io.h"
26
27 extern int verbose;
28 extern int list_only;
29 extern int am_root;
30 extern int am_server;
31 extern int am_daemon;
32 extern int am_sender;
33 extern int am_generator;
34 extern int inc_recurse;
35 extern int do_progress;
36 extern int always_checksum;
37 extern int module_id;
38 extern int ignore_errors;
39 extern int numeric_ids;
40 extern int recurse;
41 extern int use_qsort;
42 extern int xfer_dirs;
43 extern int filesfrom_fd;
44 extern int one_file_system;
45 extern int copy_dirlinks;
46 extern int keep_dirlinks;
47 extern int preserve_acls;
48 extern int preserve_xattrs;
49 extern int preserve_links;
50 extern int preserve_hard_links;
51 extern int preserve_devices;
52 extern int preserve_specials;
53 extern int uid_ndx;
54 extern int gid_ndx;
55 extern int relative_paths;
56 extern int implied_dirs;
57 extern int file_extra_cnt;
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 struct stats stats;
66
67 extern char curr_dir[MAXPATHLEN];
68
69 extern struct chmod_mode_struct *chmod_modes;
70
71 extern struct filter_list_struct filter_list;
72 extern struct filter_list_struct server_filter_list;
73
74 #ifdef ICONV_OPTION
75 extern int ic_ndx;
76 extern int need_unsorted_flist;
77 extern iconv_t ic_send, ic_recv;
78 #endif
79
80 #define PTR_SIZE (sizeof (struct file_struct *))
81
82 int io_error;
83 int checksum_len;
84 dev_t filesystem_dev; /* used to implement -x */
85
86 struct file_list *cur_flist, *first_flist, *dir_flist;
87 int send_dir_ndx = -1, send_dir_depth = 0;
88 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
89 int file_total = 0; /* total of all active items over all file-lists */
90 int flist_eof = 0; /* all the file-lists are now known */
91
92 /* The tmp_* vars are used as a cache area by make_file() to store data
93  * that the sender doesn't need to remember in its file list.  The data
94  * will survive just long enough to be used by send_file_entry(). */
95 static dev_t tmp_rdev;
96 #ifdef SUPPORT_HARD_LINKS
97 static int64 tmp_dev, tmp_ino;
98 #endif
99 static char tmp_sum[MAX_DIGEST_LEN];
100
101 static char empty_sum[MAX_DIGEST_LEN];
102 static int flist_count_offset; /* for --delete --progress */
103 static int dir_count = 0;
104
105 static void clean_flist(struct file_list *flist, int strip_root);
106 static void output_flist(struct file_list *flist);
107
108 void init_flist(void)
109 {
110         if (verbose > 4) {
111                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
112                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
113         }
114         checksum_len = protocol_version < 21 ? 2
115                      : protocol_version < 30 ? MD4_DIGEST_LEN
116                      : MD5_DIGEST_LEN;
117 }
118
119 static int show_filelist_p(void)
120 {
121         return verbose && xfer_dirs && !am_server && !inc_recurse;
122 }
123
124 static void start_filelist_progress(char *kind)
125 {
126         rprintf(FCLIENT, "%s ... ", kind);
127         if (verbose > 1 || do_progress)
128                 rprintf(FCLIENT, "\n");
129         rflush(FINFO);
130 }
131
132 static void emit_filelist_progress(int count)
133 {
134         rprintf(FCLIENT, " %d files...\r", count);
135 }
136
137 static void maybe_emit_filelist_progress(int count)
138 {
139         if (do_progress && show_filelist_p() && (count % 100) == 0)
140                 emit_filelist_progress(count);
141 }
142
143 static void finish_filelist_progress(const struct file_list *flist)
144 {
145         if (do_progress) {
146                 /* This overwrites the progress line */
147                 rprintf(FINFO, "%d file%sto consider\n",
148                         flist->used, flist->used == 1 ? " " : "s ");
149         } else
150                 rprintf(FINFO, "done\n");
151 }
152
153 void show_flist_stats(void)
154 {
155         /* Nothing yet */
156 }
157
158 static void list_file_entry(struct file_struct *f)
159 {
160         char permbuf[PERMSTRING_SIZE];
161         double len;
162
163         if (!F_IS_ACTIVE(f)) {
164                 /* this can happen if duplicate names were removed */
165                 return;
166         }
167
168         permstring(permbuf, f->mode);
169         len = F_LENGTH(f);
170
171         /* TODO: indicate '+' if the entry has an ACL. */
172
173 #ifdef SUPPORT_LINKS
174         if (preserve_links && S_ISLNK(f->mode)) {
175                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
176                         permbuf, len, timestring(f->modtime),
177                         f_name(f, NULL), F_SYMLINK(f));
178         } else
179 #endif
180         {
181                 rprintf(FINFO, "%s %11.0f %s %s\n",
182                         permbuf, len, timestring(f->modtime),
183                         f_name(f, NULL));
184         }
185 }
186
187 /* Stat either a symlink or its referent, depending on the settings of
188  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
189  *
190  * If path is the name of a symlink, then the linkbuf buffer (which must hold
191  * MAXPATHLEN chars) will be set to the symlink's target string.
192  *
193  * The stat structure pointed to by stp will contain information about the
194  * link or the referent as appropriate, if they exist. */
195 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
196 {
197 #ifdef SUPPORT_LINKS
198         if (link_stat(path, stp, copy_dirlinks) < 0)
199                 return -1;
200         if (S_ISLNK(stp->st_mode)) {
201                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
202                 if (llen < 0)
203                         return -1;
204                 linkbuf[llen] = '\0';
205                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
206                         if (verbose > 1) {
207                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
208                                         path, linkbuf);
209                         }
210                         return x_stat(path, stp, NULL);
211                 }
212         }
213         return 0;
214 #else
215         return x_stat(path, stp, NULL);
216 #endif
217 }
218
219 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
220 {
221 #ifdef SUPPORT_LINKS
222         if (copy_links)
223                 return x_stat(path, stp, NULL);
224         if (x_lstat(path, stp, NULL) < 0)
225                 return -1;
226         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
227                 STRUCT_STAT st;
228                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
229                         *stp = st;
230         }
231         return 0;
232 #else
233         return x_stat(path, stp, NULL);
234 #endif
235 }
236
237 /* This function is used to check if a file should be included/excluded
238  * from the list of files based on its name and type etc.  The value of
239  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
240 static int is_excluded(char *fname, int is_dir, int filter_level)
241 {
242 #if 0 /* This currently never happens, so avoid a useless compare. */
243         if (filter_level == NO_FILTERS)
244                 return 0;
245 #endif
246         if (fname) {
247                 /* never exclude '.', even if somebody does --exclude '*' */
248                 if (fname[0] == '.' && !fname[1])
249                         return 0;
250                 /* Handle the -R version of the '.' dir. */
251                 if (fname[0] == '/') {
252                         int len = strlen(fname);
253                         if (fname[len-1] == '.' && fname[len-2] == '/')
254                                 return 0;
255                 }
256         }
257         if (server_filter_list.head
258             && check_filter(&server_filter_list, fname, is_dir) < 0)
259                 return 1;
260         if (filter_level != ALL_FILTERS)
261                 return 0;
262         if (filter_list.head
263             && check_filter(&filter_list, fname, is_dir) < 0)
264                 return 1;
265         return 0;
266 }
267
268 static void send_directory(int f, struct file_list *flist,
269                            char *fbuf, int len, int flags);
270
271 static const char *pathname, *orig_dir;
272 static int pathname_len;
273
274
275 /* Make sure flist can hold at least flist->used + extra entries. */
276 static void flist_expand(struct file_list *flist, int extra)
277 {
278         struct file_struct **new_ptr;
279
280         if (flist->used + extra <= flist->malloced)
281                 return;
282
283         if (flist->malloced < FLIST_START)
284                 flist->malloced = FLIST_START;
285         else if (flist->malloced >= FLIST_LINEAR)
286                 flist->malloced += FLIST_LINEAR;
287         else
288                 flist->malloced *= 2;
289
290         /* In case count jumped or we are starting the list
291          * with a known size just set it. */
292         if (flist->malloced < flist->used + extra)
293                 flist->malloced = flist->used + extra;
294
295         new_ptr = realloc_array(flist->files, struct file_struct *,
296                                 flist->malloced);
297
298         if (verbose >= 2 && flist->malloced != FLIST_START) {
299                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
300                     who_am_i(),
301                     (double)sizeof flist->files[0] * flist->malloced,
302                     (new_ptr == flist->files) ? " not" : "");
303         }
304
305         flist->files = new_ptr;
306
307         if (!flist->files)
308                 out_of_memory("flist_expand");
309 }
310
311 static void flist_done_allocating(struct file_list *flist)
312 {
313         void *ptr = pool_boundary(flist->file_pool, 8*1024);
314         if (flist->pool_boundary == ptr)
315                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
316         else
317                 flist->pool_boundary = ptr;
318 }
319
320 int push_pathname(const char *dir, int len)
321 {
322         if (dir == pathname)
323                 return 1;
324
325         if (!orig_dir)
326                 orig_dir = strdup(curr_dir);
327
328         if (pathname && !pop_dir(orig_dir)) {
329                 rsyserr(FERROR, errno, "pop_dir %s failed",
330                         full_fname(orig_dir));
331                 exit_cleanup(RERR_FILESELECT);
332         }
333
334         if (dir && !push_dir(dir, 0)) {
335                 io_error |= IOERR_GENERAL;
336                 rsyserr(FERROR, errno, "push_dir %s failed in %s",
337                         full_fname(dir), curr_dir);
338                 return 0;
339         }
340
341         pathname = dir;
342         pathname_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
343
344         return 1;
345 }
346
347 static void send_file_entry(int f, struct file_struct *file, int ndx)
348 {
349         static time_t modtime;
350         static mode_t mode;
351         static int64 dev;
352         static dev_t rdev;
353         static uint32 rdev_major;
354         static uid_t uid;
355         static gid_t gid;
356         static char *user_name, *group_name;
357         static char lastname[MAXPATHLEN];
358         char fname[MAXPATHLEN];
359         int first_hlink_ndx = -1;
360         int l1, l2;
361         int xflags;
362
363 #ifdef ICONV_OPTION
364         if (ic_send != (iconv_t)-1) {
365                 ICONV_CONST char *ibuf;
366                 char *obuf = fname;
367                 size_t ocnt = MAXPATHLEN, icnt;
368
369                 iconv(ic_send, NULL,0, NULL,0);
370                 if ((ibuf = (ICONV_CONST char *)file->dirname) != NULL) {
371                     icnt = strlen(ibuf);
372                     ocnt--; /* pre-subtract the space for the '/' */
373                     if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1)
374                         goto convert_error;
375                     *obuf++ = '/';
376                 }
377
378                 ibuf = (ICONV_CONST char *)file->basename;
379                 icnt = strlen(ibuf);
380                 if (iconv(ic_send, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
381                   convert_error:
382                         io_error |= IOERR_GENERAL;
383                         rprintf(FINFO,
384                             "[%s] cannot convert filename: %s (%s)\n",
385                             who_am_i(), f_name(file, fname), strerror(errno));
386                         return;
387                 }
388                 *obuf = '\0';
389         } else
390 #endif
391                 f_name(file, fname);
392
393         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
394
395         if (file->mode == mode)
396                 xflags |= XMIT_SAME_MODE;
397         else
398                 mode = file->mode;
399
400         if (protocol_version >= 30 && S_ISDIR(mode) && !(file->flags & FLAG_XFER_DIR))
401                 xflags |= XMIT_NON_XFER_DIR;
402
403         if ((preserve_devices && IS_DEVICE(mode))
404          || (preserve_specials && IS_SPECIAL(mode))) {
405                 if (protocol_version < 28) {
406                         if (tmp_rdev == rdev)
407                                 xflags |= XMIT_SAME_RDEV_pre28;
408                         else
409                                 rdev = tmp_rdev;
410                 } else {
411                         rdev = tmp_rdev;
412                         if ((uint32)major(rdev) == rdev_major)
413                                 xflags |= XMIT_SAME_RDEV_MAJOR;
414                         else
415                                 rdev_major = major(rdev);
416                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
417                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
418                 }
419         } else if (protocol_version < 28)
420                 rdev = MAKEDEV(0, 0);
421         if (uid_ndx) {
422                 if ((uid_t)F_OWNER(file) == uid && *lastname)
423                         xflags |= XMIT_SAME_UID;
424                 else {
425                         uid = F_OWNER(file);
426                         if (uid_ndx && !numeric_ids) {
427                                 user_name = add_uid(uid);
428                                 if (inc_recurse && user_name)
429                                         xflags |= XMIT_USER_NAME_FOLLOWS;
430                         }
431                 }
432         }
433         if (gid_ndx) {
434                 if ((gid_t)F_GROUP(file) == gid && *lastname)
435                         xflags |= XMIT_SAME_GID;
436                 else {
437                         gid = F_GROUP(file);
438                         if (gid_ndx && !numeric_ids) {
439                                 group_name = add_gid(gid);
440                                 if (inc_recurse && group_name)
441                                         xflags |= XMIT_GROUP_NAME_FOLLOWS;
442                         }
443                 }
444         }
445         if (file->modtime == modtime)
446                 xflags |= XMIT_SAME_TIME;
447         else
448                 modtime = file->modtime;
449
450 #ifdef SUPPORT_HARD_LINKS
451         if (tmp_dev != 0) {
452                 if (protocol_version >= 30) {
453                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
454                         first_hlink_ndx = (int32)(long)np->data - 1;
455                         if (first_hlink_ndx < 0) {
456                                 np->data = (void*)(long)(ndx + 1);
457                                 xflags |= XMIT_HLINK_FIRST;
458                         }
459                         xflags |= XMIT_HLINKED;
460                 } else {
461                         if (tmp_dev == dev) {
462                                 if (protocol_version >= 28)
463                                         xflags |= XMIT_SAME_DEV_pre30;
464                         } else
465                                 dev = tmp_dev;
466                         xflags |= XMIT_HLINKED;
467                 }
468         }
469 #endif
470
471         for (l1 = 0;
472             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
473             l1++) {}
474         l2 = strlen(fname+l1);
475
476         if (l1 > 0)
477                 xflags |= XMIT_SAME_NAME;
478         if (l2 > 255)
479                 xflags |= XMIT_LONG_NAME;
480
481         /* We must make sure we don't send a zero flag byte or the
482          * other end will terminate the flist transfer.  Note that
483          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
484          * it's harmless way to add a bit to the first flag byte. */
485         if (protocol_version >= 28) {
486                 if (!xflags && !S_ISDIR(mode))
487                         xflags |= XMIT_TOP_DIR;
488                 if ((xflags & 0xFF00) || !xflags) {
489                         xflags |= XMIT_EXTENDED_FLAGS;
490                         write_shortint(f, xflags);
491                 } else
492                         write_byte(f, xflags);
493         } else {
494                 if (!(xflags & 0xFF))
495                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
496                 write_byte(f, xflags);
497         }
498         if (xflags & XMIT_SAME_NAME)
499                 write_byte(f, l1);
500         if (xflags & XMIT_LONG_NAME)
501                 write_varint30(f, l2);
502         else
503                 write_byte(f, l2);
504         write_buf(f, fname + l1, l2);
505
506         if (first_hlink_ndx >= 0) {
507                 write_varint30(f, first_hlink_ndx);
508                 goto the_end;
509         }
510
511         write_varlong30(f, F_LENGTH(file), 3);
512         if (!(xflags & XMIT_SAME_TIME)) {
513                 if (protocol_version >= 30)
514                         write_varlong(f, modtime, 4);
515                 else
516                         write_int(f, modtime);
517         }
518         if (!(xflags & XMIT_SAME_MODE))
519                 write_int(f, to_wire_mode(mode));
520         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
521                 if (protocol_version < 30)
522                         write_int(f, uid);
523                 else {
524                         write_varint(f, uid);
525                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
526                                 int len = strlen(user_name);
527                                 write_byte(f, len);
528                                 write_buf(f, user_name, len);
529                         }
530                 }
531         }
532         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
533                 if (protocol_version < 30)
534                         write_int(f, gid);
535                 else {
536                         write_varint(f, gid);
537                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
538                                 int len = strlen(group_name);
539                                 write_byte(f, len);
540                                 write_buf(f, group_name, len);
541                         }
542                 }
543         }
544         if ((preserve_devices && IS_DEVICE(mode))
545          || (preserve_specials && IS_SPECIAL(mode))) {
546                 if (protocol_version < 28) {
547                         if (!(xflags & XMIT_SAME_RDEV_pre28))
548                                 write_int(f, (int)rdev);
549                 } else {
550                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
551                                 write_varint30(f, major(rdev));
552                         if (protocol_version >= 30)
553                                 write_varint(f, minor(rdev));
554                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
555                                 write_byte(f, minor(rdev));
556                         else
557                                 write_int(f, minor(rdev));
558                 }
559         }
560
561 #ifdef SUPPORT_LINKS
562         if (preserve_links && S_ISLNK(mode)) {
563                 const char *sl = F_SYMLINK(file);
564                 int len = strlen(sl);
565                 write_varint30(f, len);
566                 write_buf(f, sl, len);
567         }
568 #endif
569
570 #ifdef SUPPORT_HARD_LINKS
571         if (tmp_dev != 0 && protocol_version < 30) {
572                 if (protocol_version < 26) {
573                         /* 32-bit dev_t and ino_t */
574                         write_int(f, (int32)dev);
575                         write_int(f, (int32)tmp_ino);
576                 } else {
577                         /* 64-bit dev_t and ino_t */
578                         if (!(xflags & XMIT_SAME_DEV_pre30))
579                                 write_longint(f, dev);
580                         write_longint(f, tmp_ino);
581                 }
582         }
583 #endif
584
585         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
586                 const char *sum;
587                 if (S_ISREG(mode))
588                         sum = tmp_sum;
589                 else {
590                         /* Prior to 28, we sent a useless set of nulls. */
591                         sum = empty_sum;
592                 }
593                 write_buf(f, sum, checksum_len);
594         }
595
596   the_end:
597         strlcpy(lastname, fname, MAXPATHLEN);
598
599         if (S_ISREG(mode) || S_ISLNK(mode))
600                 stats.total_size += F_LENGTH(file);
601 }
602
603 static struct file_struct *recv_file_entry(struct file_list *flist,
604                                            int xflags, int f)
605 {
606         static int64 modtime;
607         static mode_t mode;
608         static int64 dev;
609         static dev_t rdev;
610         static uint32 rdev_major;
611         static uid_t uid;
612         static gid_t gid;
613         static uint16 gid_flags;
614         static char lastname[MAXPATHLEN], *lastdir;
615         static int lastdir_depth, lastdir_len = -1;
616         static unsigned int del_hier_name_len = 0;
617         static int in_del_hier = 0;
618         char thisname[MAXPATHLEN];
619         unsigned int l1 = 0, l2 = 0;
620         int alloc_len, basename_len, linkname_len;
621         int extra_len = file_extra_cnt * EXTRA_LEN;
622         int first_hlink_ndx = -1;
623         OFF_T file_length;
624         const char *basename;
625         struct file_struct *file;
626         alloc_pool_t *pool;
627         char *bp;
628
629         if (xflags & XMIT_SAME_NAME)
630                 l1 = read_byte(f);
631
632         if (xflags & XMIT_LONG_NAME)
633                 l2 = read_varint30(f);
634         else
635                 l2 = read_byte(f);
636
637         if (l2 >= MAXPATHLEN - l1) {
638                 rprintf(FERROR,
639                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
640                         xflags, l1, l2, lastname, who_am_i());
641                 overflow_exit("recv_file_entry");
642         }
643
644         strlcpy(thisname, lastname, l1 + 1);
645         read_sbuf(f, &thisname[l1], l2);
646         thisname[l1 + l2] = 0;
647
648         /* Abuse basename_len for a moment... */
649         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
650
651 #ifdef ICONV_OPTION
652         if (ic_recv != (iconv_t)-1) {
653                 char *obuf = thisname;
654                 ICONV_CONST char *ibuf = (ICONV_CONST char *)lastname;
655                 size_t ocnt = MAXPATHLEN, icnt = basename_len;
656
657                 if (icnt >= MAXPATHLEN) {
658                         errno = E2BIG;
659                         goto convert_error;
660                 }
661
662                 iconv(ic_recv, NULL,0, NULL,0);
663                 if (iconv(ic_recv, &ibuf,&icnt, &obuf,&ocnt) == (size_t)-1) {
664                   convert_error:
665                         io_error |= IOERR_GENERAL;
666                         rprintf(FINFO,
667                             "[%s] cannot convert filename: %s (%s)\n",
668                             who_am_i(), lastname, strerror(errno));
669                         obuf = thisname;
670                 }
671                 *obuf = '\0';
672         }
673 #endif
674
675         clean_fname(thisname, 0);
676
677         if (sanitize_paths)
678                 sanitize_path(thisname, thisname, "", 0, NULL);
679
680         if ((basename = strrchr(thisname, '/')) != NULL) {
681                 int len = basename++ - thisname;
682                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
683                         lastdir = new_array(char, len + 1);
684                         memcpy(lastdir, thisname, len);
685                         lastdir[len] = '\0';
686                         lastdir_len = len;
687                         lastdir_depth = count_dir_elements(lastdir);
688                 }
689         } else
690                 basename = thisname;
691         basename_len = strlen(basename) + 1; /* count the '\0' */
692
693 #ifdef SUPPORT_HARD_LINKS
694         if (protocol_version >= 30
695          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
696                 struct file_struct *first;
697                 first_hlink_ndx = read_varint30(f);
698                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->used) {
699                         rprintf(FERROR,
700                                 "hard-link reference out of range: %d (%d)\n",
701                                 first_hlink_ndx, flist->used);
702                         exit_cleanup(RERR_PROTOCOL);
703                 }
704                 first = flist->files[first_hlink_ndx];
705                 file_length = F_LENGTH(first);
706                 modtime = first->modtime;
707                 mode = first->mode;
708                 if (uid_ndx)
709                         uid = F_OWNER(first);
710                 if (gid_ndx)
711                         gid = F_GROUP(first);
712                 if ((preserve_devices && IS_DEVICE(mode))
713                  || (preserve_specials && IS_SPECIAL(mode))) {
714                         uint32 *devp = F_RDEV_P(first);
715                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
716                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
717                 }
718                 if (preserve_links && S_ISLNK(mode))
719                         linkname_len = strlen(F_SYMLINK(first)) + 1;
720                 else
721                         linkname_len = 0;
722                 goto create_object;
723         }
724 #endif
725
726         file_length = read_varlong30(f, 3);
727         if (!(xflags & XMIT_SAME_TIME)) {
728                 if (protocol_version >= 30) {
729                         modtime = read_varlong(f, 4);
730 #if SIZEOF_TIME_T < SIZEOF_INT64
731                         if ((modtime > INT_MAX || modtime < INT_MIN) && !am_generator) {
732                                 rprintf(FERROR,
733                                     "Time value of %s truncated on receiver.\n",
734                                     lastname);
735                         }
736 #endif
737                 } else
738                         modtime = read_int(f);
739         }
740         if (!(xflags & XMIT_SAME_MODE))
741                 mode = from_wire_mode(read_int(f));
742
743         if (chmod_modes && !S_ISLNK(mode))
744                 mode = tweak_mode(mode, chmod_modes);
745
746         if (uid_ndx && !(xflags & XMIT_SAME_UID)) {
747                 if (protocol_version < 30)
748                         uid = (uid_t)read_int(f);
749                 else {
750                         uid = (uid_t)read_varint(f);
751                         if (xflags & XMIT_USER_NAME_FOLLOWS)
752                                 uid = recv_user_name(f, uid);
753                         else if (inc_recurse && am_root && !numeric_ids)
754                                 uid = match_uid(uid);
755                 }
756         }
757         if (gid_ndx && !(xflags & XMIT_SAME_GID)) {
758                 if (protocol_version < 30)
759                         gid = (gid_t)read_int(f);
760                 else {
761                         gid = (gid_t)read_varint(f);
762                         gid_flags = 0;
763                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
764                                 gid = recv_group_name(f, gid, &gid_flags);
765                         else if (inc_recurse && (!am_root || !numeric_ids))
766                                 gid = match_gid(gid, &gid_flags);
767                 }
768         }
769
770         if ((preserve_devices && IS_DEVICE(mode))
771          || (preserve_specials && IS_SPECIAL(mode))) {
772                 if (protocol_version < 28) {
773                         if (!(xflags & XMIT_SAME_RDEV_pre28))
774                                 rdev = (dev_t)read_int(f);
775                 } else {
776                         uint32 rdev_minor;
777                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
778                                 rdev_major = read_varint30(f);
779                         if (protocol_version >= 30)
780                                 rdev_minor = read_varint(f);
781                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
782                                 rdev_minor = read_byte(f);
783                         else
784                                 rdev_minor = read_int(f);
785                         rdev = MAKEDEV(rdev_major, rdev_minor);
786                 }
787                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
788                 file_length = 0;
789         } else if (protocol_version < 28)
790                 rdev = MAKEDEV(0, 0);
791
792 #ifdef SUPPORT_LINKS
793         if (preserve_links && S_ISLNK(mode)) {
794                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
795                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
796                         rprintf(FERROR, "overflow: linkname_len=%d\n",
797                                 linkname_len - 1);
798                         overflow_exit("recv_file_entry");
799                 }
800         }
801         else
802 #endif
803                 linkname_len = 0;
804
805 #ifdef SUPPORT_HARD_LINKS
806   create_object:
807         if (preserve_hard_links) {
808                 if (protocol_version < 28 && S_ISREG(mode))
809                         xflags |= XMIT_HLINKED;
810                 if (xflags & XMIT_HLINKED)
811                         extra_len += EXTRA_LEN;
812         }
813 #endif
814
815 #ifdef SUPPORT_ACLS
816         /* We need one or two index int32s when we're preserving ACLs. */
817         if (preserve_acls)
818                 extra_len += (S_ISDIR(mode) ? 2 : 1) * EXTRA_LEN;
819 #endif
820
821         if (always_checksum && S_ISREG(mode))
822                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
823
824         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
825                 extra_len += EXTRA_LEN;
826
827 #if EXTRA_ROUNDING > 0
828         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
829                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
830 #endif
831
832         if (inc_recurse && S_ISDIR(mode)) {
833                 if (one_file_system) {
834                         /* Room to save the dir's device for -x */
835                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
836                 }
837                 pool = dir_flist->file_pool;
838         } else
839                 pool = flist->file_pool;
840
841         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
842                   + linkname_len;
843         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
844
845         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
846         bp += extra_len;
847         file = (struct file_struct *)bp;
848         bp += FILE_STRUCT_LEN;
849
850         memcpy(bp, basename, basename_len);
851         bp += basename_len + linkname_len; /* skip space for symlink too */
852
853 #ifdef SUPPORT_HARD_LINKS
854         if (xflags & XMIT_HLINKED)
855                 file->flags |= FLAG_HLINKED;
856 #endif
857         file->modtime = (time_t)modtime;
858         file->len32 = (uint32)file_length;
859         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
860                 file->flags |= FLAG_LENGTH64;
861                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
862         }
863         file->mode = mode;
864         if (uid_ndx)
865                 F_OWNER(file) = uid;
866         if (gid_ndx) {
867                 F_GROUP(file) = gid;
868                 file->flags |= gid_flags;
869         }
870 #ifdef ICONV_OPTION
871         if (ic_ndx)
872                 F_NDX(file) = flist->used + flist->ndx_start;
873 #endif
874
875         if (basename != thisname) {
876                 file->dirname = lastdir;
877                 F_DEPTH(file) = lastdir_depth + 1;
878         } else
879                 F_DEPTH(file) = 1;
880
881         if (S_ISDIR(mode)) {
882                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
883                         F_DEPTH(file)--;
884                 if (xflags & XMIT_TOP_DIR) {
885                         in_del_hier = recurse;
886                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
887                         if (relative_paths && del_hier_name_len > 2
888                             && lastname[del_hier_name_len-1] == '.'
889                             && lastname[del_hier_name_len-2] == '/')
890                                 del_hier_name_len -= 2;
891                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
892                 } else if (protocol_version >= 30) {
893                         if (!(xflags & XMIT_NON_XFER_DIR))
894                                 file->flags |= FLAG_XFER_DIR;
895                 } else if (in_del_hier) {
896                         if (!relative_paths || !del_hier_name_len
897                          || (l1 >= del_hier_name_len
898                           && lastname[del_hier_name_len] == '/'))
899                                 file->flags |= FLAG_XFER_DIR;
900                         else
901                                 in_del_hier = 0;
902                 }
903         }
904
905         if ((preserve_devices && IS_DEVICE(mode))
906          || (preserve_specials && IS_SPECIAL(mode))) {
907                 uint32 *devp = F_RDEV_P(file);
908                 DEV_MAJOR(devp) = major(rdev);
909                 DEV_MINOR(devp) = minor(rdev);
910         }
911
912 #ifdef SUPPORT_LINKS
913         if (linkname_len) {
914                 bp = (char*)file->basename + basename_len;
915                 if (first_hlink_ndx >= 0) {
916                         struct file_struct *first = flist->files[first_hlink_ndx];
917                         memcpy(bp, F_SYMLINK(first), linkname_len);
918                 } else
919                         read_sbuf(f, bp, linkname_len - 1);
920                 if (sanitize_paths)
921                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
922         }
923 #endif
924
925 #ifdef SUPPORT_HARD_LINKS
926         if (preserve_hard_links && xflags & XMIT_HLINKED) {
927                 if (protocol_version >= 30) {
928                         F_HL_GNUM(file) = xflags & XMIT_HLINK_FIRST
929                                         ? flist->used : first_hlink_ndx;
930                 } else {
931                         static int32 cnt = 0;
932                         struct idev_node *np;
933                         int64 ino;
934                         int32 ndx;
935                         if (protocol_version < 26) {
936                                 dev = read_int(f);
937                                 ino = read_int(f);
938                         } else {
939                                 if (!(xflags & XMIT_SAME_DEV_pre30))
940                                         dev = read_longint(f);
941                                 ino = read_longint(f);
942                         }
943                         np = idev_node(dev, ino);
944                         ndx = (int32)(long)np->data - 1;
945                         if (ndx < 0) {
946                                 ndx = cnt++;
947                                 np->data = (void*)(long)cnt;
948                         }
949                         F_HL_GNUM(file) = ndx;
950                 }
951         }
952 #endif
953
954         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
955                 if (S_ISREG(mode))
956                         bp = F_SUM(file);
957                 else {
958                         /* Prior to 28, we get a useless set of nulls. */
959                         bp = tmp_sum;
960                 }
961                 if (first_hlink_ndx >= 0) {
962                         struct file_struct *first = flist->files[first_hlink_ndx];
963                         memcpy(bp, F_SUM(first), checksum_len);
964                 } else
965                         read_buf(f, bp, checksum_len);
966         }
967
968 #ifdef SUPPORT_ACLS
969         if (preserve_acls && !S_ISLNK(mode))
970                 receive_acl(file, f);
971 #endif
972 #ifdef SUPPORT_XATTRS
973         if (preserve_xattrs)
974                 receive_xattr(file, f );
975 #endif
976
977         if (S_ISREG(mode) || S_ISLNK(mode))
978                 stats.total_size += file_length;
979
980         return file;
981 }
982
983 /* Create a file_struct for a named file by reading its stat() information
984  * and performing extensive checks against global options.
985  *
986  * Returns a pointer to the new file struct, or NULL if there was an error
987  * or this file should be excluded. */
988 struct file_struct *make_file(const char *fname, struct file_list *flist,
989                               STRUCT_STAT *stp, int flags, int filter_level)
990 {
991         static char *lastdir;
992         static int lastdir_len = -1;
993         struct file_struct *file;
994         char thisname[MAXPATHLEN];
995         char linkname[MAXPATHLEN];
996         int alloc_len, basename_len, linkname_len;
997         int extra_len = file_extra_cnt * EXTRA_LEN;
998         const char *basename;
999         alloc_pool_t *pool;
1000         STRUCT_STAT st;
1001         char *bp;
1002
1003         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1004                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1005                 return NULL;
1006         }
1007         clean_fname(thisname, 0);
1008         if (sanitize_paths)
1009                 sanitize_path(thisname, thisname, "", 0, NULL);
1010
1011         if (stp && S_ISDIR(stp->st_mode)) {
1012                 st = *stp; /* Needed for "symlink/." with --relative. */
1013                 *linkname = '\0'; /* make IBM code checker happy */
1014         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1015                 int save_errno = errno;
1016                 /* See if file is excluded before reporting an error. */
1017                 if (filter_level != NO_FILTERS
1018                  && (is_excluded(thisname, 0, filter_level)
1019                   || is_excluded(thisname, 1, filter_level))) {
1020                         if (ignore_perishable && save_errno != ENOENT)
1021                                 non_perishable_cnt++;
1022                         return NULL;
1023                 }
1024                 if (save_errno == ENOENT) {
1025 #ifdef SUPPORT_LINKS
1026                         /* Avoid "vanished" error if symlink points nowhere. */
1027                         if (copy_links && x_lstat(thisname, &st, NULL) == 0
1028                             && S_ISLNK(st.st_mode)) {
1029                                 io_error |= IOERR_GENERAL;
1030                                 rprintf(FERROR, "symlink has no referent: %s\n",
1031                                         full_fname(thisname));
1032                         } else
1033 #endif
1034                         {
1035                                 enum logcode c = am_daemon && protocol_version < 28
1036                                     ? FERROR : FINFO;
1037                                 io_error |= IOERR_VANISHED;
1038                                 rprintf(c, "file has vanished: %s\n",
1039                                         full_fname(thisname));
1040                         }
1041                 } else {
1042                         io_error |= IOERR_GENERAL;
1043                         rsyserr(FERROR, save_errno, "readlink %s failed",
1044                                 full_fname(thisname));
1045                 }
1046                 return NULL;
1047         }
1048
1049         /* backup.c calls us with filter_level set to NO_FILTERS. */
1050         if (filter_level == NO_FILTERS)
1051                 goto skip_filters;
1052
1053         if (S_ISDIR(st.st_mode)) {
1054                 if (!xfer_dirs) {
1055                         rprintf(FINFO, "skipping directory %s\n", thisname);
1056                         return NULL;
1057                 }
1058         } else
1059                 flags &= ~FLAG_XFER_DIR;
1060
1061         /* -x only affects directories because we need to avoid recursing
1062          * into a mount-point directory, not to avoid copying a symlinked
1063          * file if -L (or similar) was specified. */
1064         if (one_file_system && st.st_dev != filesystem_dev
1065          && S_ISDIR(st.st_mode)) {
1066                 if (one_file_system > 1) {
1067                         if (verbose > 2) {
1068                                 rprintf(FINFO, "skipping mount-point dir %s\n",
1069                                         thisname);
1070                         }
1071                         return NULL;
1072                 }
1073                 flags |= FLAG_MOUNT_DIR;
1074         }
1075
1076         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1077                 if (ignore_perishable)
1078                         non_perishable_cnt++;
1079                 return NULL;
1080         }
1081
1082         if (lp_ignore_nonreadable(module_id)) {
1083 #ifdef SUPPORT_LINKS
1084                 if (!S_ISLNK(st.st_mode))
1085 #endif
1086                         if (access(thisname, R_OK) != 0)
1087                                 return NULL;
1088         }
1089
1090   skip_filters:
1091
1092         /* Only divert a directory in the main transfer. */
1093         if (flist) {
1094                 if (flist->prev && S_ISDIR(st.st_mode)
1095                  && flags & FLAG_DIVERT_DIRS) {
1096                         /* Room for parent/sibling/next-child info. */
1097                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1098                         dir_count++;
1099                         pool = dir_flist->file_pool;
1100                 } else
1101                         pool = flist->file_pool;
1102         } else
1103                 pool = NULL;
1104
1105         if (verbose > 2) {
1106                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1107                         who_am_i(), thisname, filter_level);
1108         }
1109
1110         if ((basename = strrchr(thisname, '/')) != NULL) {
1111                 int len = basename++ - thisname;
1112                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1113                         lastdir = new_array(char, len + 1);
1114                         memcpy(lastdir, thisname, len);
1115                         lastdir[len] = '\0';
1116                         lastdir_len = len;
1117                 }
1118         } else
1119                 basename = thisname;
1120         basename_len = strlen(basename) + 1; /* count the '\0' */
1121
1122 #ifdef SUPPORT_LINKS
1123         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1124 #else
1125         linkname_len = 0;
1126 #endif
1127
1128         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1129                 extra_len += EXTRA_LEN;
1130
1131 #if EXTRA_ROUNDING > 0
1132         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1133                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1134 #endif
1135
1136         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1137                   + linkname_len;
1138         if (pool)
1139                 bp = pool_alloc(pool, alloc_len, "make_file");
1140         else {
1141                 if (!(bp = new_array(char, alloc_len)))
1142                         out_of_memory("make_file");
1143         }
1144
1145         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1146         bp += extra_len;
1147         file = (struct file_struct *)bp;
1148         bp += FILE_STRUCT_LEN;
1149
1150         memcpy(bp, basename, basename_len);
1151         bp += basename_len + linkname_len; /* skip space for symlink too */
1152
1153 #ifdef SUPPORT_HARD_LINKS
1154         if (preserve_hard_links && flist && flist->prev) {
1155                 if (protocol_version >= 28
1156                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1157                  : S_ISREG(st.st_mode)) {
1158                         tmp_dev = st.st_dev;
1159                         tmp_ino = st.st_ino;
1160                 } else
1161                         tmp_dev = 0;
1162         }
1163 #endif
1164
1165 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1166         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1167                 tmp_rdev = st.st_rdev;
1168                 st.st_size = 0;
1169         }
1170 #endif
1171
1172         file->flags = flags;
1173         file->modtime = st.st_mtime;
1174         file->len32 = (uint32)st.st_size;
1175         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1176                 file->flags |= FLAG_LENGTH64;
1177                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1178         }
1179         file->mode = st.st_mode;
1180         if (uid_ndx)
1181                 F_OWNER(file) = st.st_uid;
1182         if (gid_ndx)
1183                 F_GROUP(file) = st.st_gid;
1184
1185         if (basename != thisname)
1186                 file->dirname = lastdir;
1187
1188 #ifdef SUPPORT_LINKS
1189         if (linkname_len) {
1190                 bp = (char*)file->basename + basename_len;
1191                 memcpy(bp, linkname, linkname_len);
1192         }
1193 #endif
1194
1195         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1196                 file_checksum(thisname, tmp_sum, st.st_size);
1197
1198         F_PATHNAME(file) = pathname;
1199
1200         /* This code is only used by the receiver when it is building
1201          * a list of files for a delete pass. */
1202         if (keep_dirlinks && linkname_len && flist) {
1203                 STRUCT_STAT st2;
1204                 int save_mode = file->mode;
1205                 file->mode = S_IFDIR; /* Find a directory with our name. */
1206                 if (flist_find(dir_flist, file) >= 0
1207                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1208                         file->modtime = st2.st_mtime;
1209                         file->len32 = 0;
1210                         file->mode = st2.st_mode;
1211                         if (uid_ndx)
1212                                 F_OWNER(file) = st2.st_uid;
1213                         if (gid_ndx)
1214                                 F_GROUP(file) = st2.st_gid;
1215                 } else
1216                         file->mode = save_mode;
1217         }
1218
1219         if (basename_len == 0+1)
1220                 return NULL;
1221
1222 #ifdef ICONV_OPTION
1223         if (ic_ndx)
1224                 F_NDX(file) = dir_count - 1;
1225 #endif
1226
1227         return file;
1228 }
1229
1230 /* Only called for temporary file_struct entries created by make_file(). */
1231 void unmake_file(struct file_struct *file)
1232 {
1233         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1234 #if EXTRA_ROUNDING > 0
1235         if (extra_cnt & EXTRA_ROUNDING)
1236                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1237 #endif
1238         free(REQ_EXTRA(file, extra_cnt));
1239 }
1240
1241 static struct file_struct *send_file_name(int f, struct file_list *flist,
1242                                           char *fname, STRUCT_STAT *stp,
1243                                           int flags, int filter_level)
1244 {
1245         struct file_struct *file;
1246 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1247         statx sx;
1248 #endif
1249
1250         file = make_file(fname, flist, stp, flags, filter_level);
1251         if (!file)
1252                 return NULL;
1253
1254         if (chmod_modes && !S_ISLNK(file->mode))
1255                 file->mode = tweak_mode(file->mode, chmod_modes);
1256
1257 #ifdef SUPPORT_ACLS
1258         if (preserve_acls && !S_ISLNK(file->mode) && f >= 0) {
1259                 sx.st.st_mode = file->mode;
1260                 sx.acc_acl = sx.def_acl = NULL;
1261                 if (get_acl(fname, &sx) < 0)
1262                         return NULL;
1263         }
1264 #endif
1265 #ifdef SUPPORT_XATTRS
1266         if (preserve_xattrs && f >= 0) {
1267                 sx.xattr = NULL;
1268                 if (get_xattr(fname, &sx) < 0)
1269                         return NULL;
1270         }
1271 #endif
1272
1273         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1274
1275         flist_expand(flist, 1);
1276         flist->files[flist->used++] = file;
1277         if (f >= 0) {
1278                 send_file_entry(f, file, flist->used - 1);
1279 #ifdef SUPPORT_ACLS
1280                 if (preserve_acls && !S_ISLNK(file->mode)) {
1281                         send_acl(&sx, f);
1282                         free_acl(&sx);
1283                 }
1284 #endif
1285 #ifdef SUPPORT_XATTRS
1286                 if (preserve_xattrs) {
1287                         F_XATTR(file) = send_xattr(&sx, f);
1288                         free_xattr(&sx);
1289                 }
1290 #endif
1291         }
1292         return file;
1293 }
1294
1295 static void send_if_directory(int f, struct file_list *flist,
1296                               struct file_struct *file,
1297                               char *fbuf, unsigned int ol,
1298                               int flags)
1299 {
1300         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1301
1302         if (S_ISDIR(file->mode)
1303             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1304                 void *save_filters;
1305                 unsigned int len = strlen(fbuf);
1306                 if (len > 1 && fbuf[len-1] == '/')
1307                         fbuf[--len] = '\0';
1308                 if (len >= MAXPATHLEN - 1) {
1309                         io_error |= IOERR_GENERAL;
1310                         rprintf(FERROR, "skipping long-named directory: %s\n",
1311                                 full_fname(fbuf));
1312                         return;
1313                 }
1314                 save_filters = push_local_filters(fbuf, len);
1315                 send_directory(f, flist, fbuf, len, flags);
1316                 pop_local_filters(save_filters);
1317                 fbuf[ol] = '\0';
1318                 if (is_dot_dir)
1319                         fbuf[ol-1] = '.';
1320         }
1321 }
1322
1323 static int file_compare(const void *file1, const void *file2)
1324 {
1325         return f_name_cmp(*(struct file_struct **)file1,
1326                           *(struct file_struct **)file2);
1327 }
1328
1329 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1330  * version, but I (Wayne) changed the merge code to do less copying and
1331  * to require only half the amount of temporary memory. */
1332 static void fsort_tmp(struct file_struct **fp, size_t num,
1333                       struct file_struct **tmp)
1334 {
1335         struct file_struct **f1, **f2, **t;
1336         size_t n1, n2;
1337
1338         n1 = num / 2;
1339         n2 = num - n1;
1340         f1 = fp;
1341         f2 = fp + n1;
1342
1343         if (n1 > 1)
1344                 fsort_tmp(f1, n1, tmp);
1345         if (n2 > 1)
1346                 fsort_tmp(f2, n2, tmp);
1347
1348         while (f_name_cmp(*f1, *f2) <= 0) {
1349                 if (!--n1)
1350                         return;
1351                 f1++;
1352         }
1353
1354         t = tmp;
1355         memcpy(t, f1, n1 * PTR_SIZE);
1356
1357         *f1++ = *f2++, n2--;
1358
1359         while (n1 > 0 && n2 > 0) {
1360                 if (f_name_cmp(*t, *f2) <= 0)
1361                         *f1++ = *t++, n1--;
1362                 else
1363                         *f1++ = *f2++, n2--;
1364         }
1365
1366         if (n1 > 0)
1367                 memcpy(f1, t, n1 * PTR_SIZE);
1368 }
1369
1370 /* This file-struct sorting routine makes sure that any identical names in
1371  * the file list stay in the same order as they were in the original list.
1372  * This is particularly vital in inc_recurse mode where we expect a sort
1373  * on the flist to match the exact order of a sort on the dir_flist. */
1374 static void fsort(struct file_struct **fp, size_t num)
1375 {
1376         if (num <= 1)
1377                 return;
1378
1379         if (use_qsort)
1380                 qsort(fp, num, PTR_SIZE, file_compare);
1381         else {
1382                 struct file_struct **tmp = new_array(struct file_struct *,
1383                                                      (num+1) / 2);
1384                 fsort_tmp(fp, num, tmp);
1385                 free(tmp);
1386         }
1387 }
1388
1389 /* We take an entire set of sibling dirs from the sorted flist and link them
1390  * into the tree, setting the appropriate parent/child/sibling pointers. */
1391 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1392                              int dir_cnt)
1393 {
1394         int i;
1395         int32 *dp = NULL;
1396         int32 *parent_dp = parent_ndx < 0 ? NULL
1397                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1398
1399         flist_expand(dir_flist, dir_cnt);
1400         dir_flist->sorted = dir_flist->files;
1401
1402         for (i = 0; dir_cnt; i++) {
1403                 struct file_struct *file = from_flist->sorted[i];
1404
1405                 if (!S_ISDIR(file->mode))
1406                         continue;
1407
1408                 dir_flist->files[dir_flist->used++] = file;
1409                 dir_cnt--;
1410
1411                 if (!(file->flags & FLAG_XFER_DIR)
1412                  || file->flags & FLAG_MOUNT_DIR)
1413                         continue;
1414
1415                 if (dp)
1416                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1417                 else if (parent_dp)
1418                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1419                 else
1420                         send_dir_ndx = dir_flist->used - 1;
1421
1422                 dp = F_DIR_NODE_P(file);
1423                 DIR_PARENT(dp) = parent_ndx;
1424                 DIR_FIRST_CHILD(dp) = -1;
1425         }
1426         if (dp)
1427                 DIR_NEXT_SIBLING(dp) = -1;
1428 }
1429
1430 /* This function is normally called by the sender, but the receiving side also
1431  * calls it from get_dirlist() with f set to -1 so that we just construct the
1432  * file list in memory without sending it over the wire.  Also, get_dirlist()
1433  * might call this with f set to -2, which also indicates that local filter
1434  * rules should be ignored. */
1435 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1436                            int flags)
1437 {
1438         struct dirent *di;
1439         unsigned remainder;
1440         char *p;
1441         DIR *d;
1442         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1443         int start = flist->used;
1444         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1445
1446         assert(flist != NULL);
1447
1448         if (!(d = opendir(fbuf))) {
1449                 io_error |= IOERR_GENERAL;
1450                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1451                 return;
1452         }
1453
1454         p = fbuf + len;
1455         if (len != 1 || *fbuf != '/')
1456                 *p++ = '/';
1457         *p = '\0';
1458         remainder = MAXPATHLEN - (p - fbuf);
1459
1460         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1461                 char *dname = d_name(di);
1462                 if (dname[0] == '.' && (dname[1] == '\0'
1463                     || (dname[1] == '.' && dname[2] == '\0')))
1464                         continue;
1465                 if (strlcpy(p, dname, remainder) >= remainder) {
1466                         io_error |= IOERR_GENERAL;
1467                         rprintf(FINFO,
1468                                 "cannot send long-named file %s\n",
1469                                 full_fname(fbuf));
1470                         continue;
1471                 }
1472                 if (dname[0] == '\0') {
1473                         io_error |= IOERR_GENERAL;
1474                         rprintf(FINFO,
1475                                 "cannot send file with empty name in %s\n",
1476                                 full_fname(fbuf));
1477                         continue;
1478                 }
1479
1480                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1481         }
1482
1483         fbuf[len] = '\0';
1484
1485         if (errno) {
1486                 io_error |= IOERR_GENERAL;
1487                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1488         }
1489
1490         closedir(d);
1491
1492         if (f >= 0 && recurse && !divert_dirs) {
1493                 int i, end = flist->used - 1;
1494                 /* send_if_directory() bumps flist->used, so use "end". */
1495                 for (i = start; i <= end; i++)
1496                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1497         }
1498 }
1499
1500 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1501 {
1502         char fbuf[MAXPATHLEN];
1503         int dlen;
1504
1505         f_name(file, fbuf);
1506         dlen = strlen(fbuf);
1507
1508         if (F_PATHNAME(file) != pathname) {
1509                 if (!push_pathname(F_PATHNAME(file), -1))
1510                         exit_cleanup(RERR_FILESELECT);
1511         }
1512
1513         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1514
1515         send_directory(f, flist, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1516 }
1517
1518 void send_extra_file_list(int f, int at_least)
1519 {
1520         struct file_list *flist;
1521         int64 start_write;
1522         int future_cnt, save_io_error = io_error;
1523
1524         if (flist_eof)
1525                 return;
1526
1527         /* Keep sending data until we have the requested number of
1528          * files in the upcoming file-lists. */
1529         if (cur_flist->next) {
1530                 flist = first_flist->prev; /* the newest flist */
1531                 future_cnt = flist->ndx_end - cur_flist->next->ndx_start + 1;
1532         } else
1533                 future_cnt = 0;
1534         while (future_cnt < at_least) {
1535                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1536                 int dir_ndx, dstart = dir_count;
1537                 int32 *dp;
1538
1539                 flist = flist_new(0, "send_extra_file_list");
1540                 start_write = stats.total_written;
1541
1542 #ifdef ICONV_OPTION
1543                 if (ic_ndx)
1544                         dir_ndx = F_NDX(file);
1545                 else
1546 #endif
1547                         dir_ndx = send_dir_ndx;
1548                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1549                 flist->parent_ndx = dir_ndx;
1550
1551                 send1extra(f, file, flist);
1552                 dp = F_DIR_NODE_P(file);
1553
1554                 /* If there are any duplicate directory names that follow, we
1555                  * send all the dirs together in one file-list.  The dir_flist
1556                  * tree links all the child subdirs onto the last dup dir. */
1557                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1558                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1559                         send_dir_ndx = dir_ndx;
1560                         file = dir_flist->sorted[dir_ndx];
1561                         send1extra(f, file, flist);
1562                         dp = F_DIR_NODE_P(file);
1563                 }
1564
1565                 write_byte(f, 0);
1566
1567 #ifdef ICONV_OPTION
1568                 if (need_unsorted_flist) {
1569                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1570                                 out_of_memory("send_extra_file_list");
1571                         memcpy(flist->sorted, flist->files,
1572                                flist->used * sizeof (struct file_struct*));
1573                 } else
1574 #endif
1575                         flist->sorted = flist->files;
1576
1577                 clean_flist(flist, 0);
1578
1579                 flist->ndx_end = flist->ndx_start + flist->used - 1
1580                                - (dir_count - dstart);
1581
1582                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1583                 flist_done_allocating(flist);
1584
1585                 file_total += flist->used;
1586                 future_cnt += flist->used;
1587                 stats.flist_size += stats.total_written - start_write;
1588                 stats.num_files += flist->used;
1589                 if (verbose > 3)
1590                         output_flist(flist);
1591
1592                 if (DIR_FIRST_CHILD(dp) >= 0) {
1593                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1594                         send_dir_depth++;
1595                 } else {
1596                         while (DIR_NEXT_SIBLING(dp) < 0) {
1597                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1598                                         write_ndx(f, NDX_FLIST_EOF);
1599                                         flist_eof = 1;
1600                                         change_local_filter_dir(NULL, 0, 0);
1601                                         goto finish;
1602                                 }
1603                                 send_dir_depth--;
1604                                 file = dir_flist->sorted[send_dir_ndx];
1605                                 dp = F_DIR_NODE_P(file);
1606                         }
1607                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1608                 }
1609         }
1610
1611   finish:
1612         if (io_error != save_io_error && !ignore_errors)
1613                 send_msg_int(MSG_IO_ERROR, io_error);
1614 }
1615
1616 struct file_list *send_file_list(int f, int argc, char *argv[])
1617 {
1618         static const char *lastdir;
1619         static int lastdir_len = -1;
1620         int len, dirlen;
1621         STRUCT_STAT st;
1622         char *p, *dir;
1623         char lastpath[MAXPATHLEN] = "";
1624         struct file_list *flist;
1625         struct timeval start_tv, end_tv;
1626         int64 start_write;
1627         int use_ff_fd = 0;
1628         int flags, disable_buffering;
1629
1630         rprintf(FLOG, "building file list\n");
1631         if (show_filelist_p())
1632                 start_filelist_progress("building file list");
1633         else if (inc_recurse && verbose && !am_server)
1634                 rprintf(FCLIENT, "sending incremental file list\n");
1635
1636         start_write = stats.total_written;
1637         gettimeofday(&start_tv, NULL);
1638
1639 #ifdef SUPPORT_HARD_LINKS
1640         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1641                 init_hard_links();
1642 #endif
1643
1644         flist = cur_flist = flist_new(0, "send_file_list");
1645         if (inc_recurse) {
1646                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1647                 flags = FLAG_DIVERT_DIRS | FLAG_XFER_DIR;
1648         } else {
1649                 dir_flist = cur_flist;
1650                 flags = FLAG_XFER_DIR;
1651         }
1652
1653         disable_buffering = io_start_buffering_out(f);
1654         if (filesfrom_fd >= 0) {
1655                 if (argv[0] && !push_dir(argv[0], 0)) {
1656                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1657                                 full_fname(argv[0]), curr_dir);
1658                         exit_cleanup(RERR_FILESELECT);
1659                 }
1660                 use_ff_fd = 1;
1661         }
1662
1663         while (1) {
1664                 char fbuf[MAXPATHLEN];
1665                 char *fn;
1666                 int is_dot_dir;
1667
1668                 if (use_ff_fd) {
1669                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1670                                 break;
1671                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1672                 } else {
1673                         if (argc-- == 0)
1674                                 break;
1675                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1676                         if (sanitize_paths)
1677                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1678                 }
1679
1680                 len = strlen(fbuf);
1681                 if (relative_paths) {
1682                         /* We clean up fbuf below. */
1683                         is_dot_dir = 0;
1684                 } else if (!len || fbuf[len - 1] == '/') {
1685                         if (len == 2 && fbuf[0] == '.') {
1686                                 /* Turn "./" into just "." rather than "./." */
1687                                 fbuf[1] = '\0';
1688                         } else {
1689                                 if (len + 1 >= MAXPATHLEN)
1690                                         overflow_exit("send_file_list");
1691                                 fbuf[len++] = '.';
1692                                 fbuf[len] = '\0';
1693                         }
1694                         is_dot_dir = 1;
1695                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1696                     && (len == 2 || fbuf[len-3] == '/')) {
1697                         if (len + 2 >= MAXPATHLEN)
1698                                 overflow_exit("send_file_list");
1699                         fbuf[len++] = '/';
1700                         fbuf[len++] = '.';
1701                         fbuf[len] = '\0';
1702                         is_dot_dir = 1;
1703                 } else {
1704                         is_dot_dir = fbuf[len-1] == '.'
1705                                    && (len == 1 || fbuf[len-2] == '/');
1706                 }
1707
1708                 dir = NULL;
1709
1710                 if (!relative_paths) {
1711                         p = strrchr(fbuf, '/');
1712                         if (p) {
1713                                 *p = '\0';
1714                                 if (p == fbuf)
1715                                         dir = "/";
1716                                 else
1717                                         dir = fbuf;
1718                                 len -= p - fbuf + 1;
1719                                 fn = p + 1;
1720                         } else
1721                                 fn = fbuf;
1722                 } else {
1723                         if ((p = strstr(fbuf, "/./")) != NULL) {
1724                                 *p = '\0';
1725                                 if (p == fbuf)
1726                                         dir = "/";
1727                                 else
1728                                         dir = fbuf;
1729                                 len -= p - fbuf + 3;
1730                                 fn = p + 3;
1731                         } else
1732                                 fn = fbuf;
1733                         /* Get rid of trailing "/" and "/.". */
1734                         while (len) {
1735                                 if (fn[len - 1] == '/') {
1736                                         is_dot_dir = 1;
1737                                         if (!--len && !dir) {
1738                                                 len++;
1739                                                 break;
1740                                         }
1741                                 }
1742                                 else if (len >= 2 && fn[len - 1] == '.'
1743                                                   && fn[len - 2] == '/') {
1744                                         is_dot_dir = 1;
1745                                         if (!(len -= 2) && !dir) {
1746                                                 len++;
1747                                                 break;
1748                                         }
1749                                 } else
1750                                         break;
1751                         }
1752                         if (len == 1 && fn[0] == '/')
1753                                 fn[len++] = '.';
1754                         fn[len] = '\0';
1755                         /* Reject a ".." dir in the active part of the path. */
1756                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1757                                 if ((p[2] == '/' || p[2] == '\0')
1758                                  && (p == fn || p[-1] == '/')) {
1759                                         rprintf(FERROR,
1760                                             "found \"..\" dir in relative path: %s\n",
1761                                             fbuf);
1762                                         exit_cleanup(RERR_SYNTAX);
1763                                 }
1764                         }
1765                 }
1766
1767                 if (!*fn) {
1768                         len = 1;
1769                         fn = ".";
1770                 }
1771
1772                 dirlen = dir ? strlen(dir) : 0;
1773                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
1774                         if (!push_pathname(dir ? strdup(dir) : NULL, dirlen))
1775                                 goto push_error;
1776                         lastdir = pathname;
1777                         lastdir_len = pathname_len;
1778                 } else if (!push_pathname(lastdir, lastdir_len)) {
1779                   push_error:
1780                         io_error |= IOERR_GENERAL;
1781                         rsyserr(FERROR, errno, "push_dir %s failed in %s",
1782                                 full_fname(dir), curr_dir);
1783                         continue;
1784                 }
1785
1786                 if (fn != fbuf)
1787                         memmove(fbuf, fn, len + 1);
1788
1789                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1790                         io_error |= IOERR_GENERAL;
1791                         rsyserr(FERROR, errno, "link_stat %s failed",
1792                                 full_fname(fbuf));
1793                         continue;
1794                 }
1795
1796                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1797                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1798                         continue;
1799                 }
1800
1801                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1802                         /* Send the implied directories at the start of the
1803                          * source spec, so we get their permissions right. */
1804                         char *lp = lastpath, *slash = fbuf;
1805                         *p = '\0';
1806                         /* Skip any initial directories in our path that we
1807                          * have in common with lastpath. */
1808                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1809                                 if (*fn == '/')
1810                                         slash = fn;
1811                         }
1812                         *p = '/';
1813                         if (fn != p || (*lp && *lp != '/')) {
1814                                 int save_copy_links = copy_links;
1815                                 int save_xfer_dirs = xfer_dirs;
1816                                 int dir_flags = flags & ~FLAG_XFER_DIR;
1817                                 copy_links |= copy_unsafe_links;
1818                                 xfer_dirs = 1;
1819                                 while ((slash = strchr(slash+1, '/')) != 0) {
1820                                         *slash = '\0';
1821                                         send_file_name(f, flist, fbuf, NULL,
1822                                                        dir_flags, ALL_FILTERS);
1823                                         *slash = '/';
1824                                 }
1825                                 copy_links = save_copy_links;
1826                                 xfer_dirs = save_xfer_dirs;
1827                                 *p = '\0';
1828                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1829                                 *p = '/';
1830                         }
1831                 }
1832
1833                 if (one_file_system)
1834                         filesystem_dev = st.st_dev;
1835
1836                 if (recurse || (xfer_dirs && is_dot_dir)) {
1837                         struct file_struct *file;
1838                         int top_flags = FLAG_TOP_DIR | flags;
1839                         file = send_file_name(f, flist, fbuf, &st,
1840                                               top_flags, ALL_FILTERS);
1841                         if (file && !inc_recurse)
1842                                 send_if_directory(f, flist, file, fbuf, len, flags);
1843                 } else
1844                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1845         }
1846
1847         gettimeofday(&end_tv, NULL);
1848         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1849                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1850         if (stats.flist_buildtime == 0)
1851                 stats.flist_buildtime = 1;
1852         start_tv = end_tv;
1853
1854         write_byte(f, 0); /* Indicate end of file list */
1855
1856 #ifdef SUPPORT_HARD_LINKS
1857         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1858                 idev_destroy();
1859 #endif
1860
1861         if (show_filelist_p())
1862                 finish_filelist_progress(flist);
1863
1864         gettimeofday(&end_tv, NULL);
1865         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1866                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1867
1868         /* When converting names, both sides keep an unsorted file-list array
1869          * because the names will differ on the sending and receiving sides
1870          * (both sides will use the unsorted index number for each item). */
1871
1872         /* Sort the list without removing any duplicates.  This allows the
1873          * receiving side to ask for whatever name it kept.  For incremental
1874          * recursion mode, the sender marks duplicate dirs so that it can
1875          * send them together in a single file-list. */
1876 #ifdef ICONV_OPTION
1877         if (need_unsorted_flist) {
1878                 if (inc_recurse) {
1879                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1880                                 out_of_memory("send_file_list");
1881                         memcpy(flist->sorted, flist->files,
1882                                flist->used * sizeof (struct file_struct*));
1883                         clean_flist(flist, 0);
1884                 } else {
1885                         flist->sorted = flist->files;
1886                         flist->low = 0;
1887                         flist->high = flist->used - 1;
1888                 }
1889         } else
1890 #endif
1891         {
1892                 flist->sorted = flist->files;
1893                 clean_flist(flist, 0);
1894         }
1895         file_total += flist->used;
1896
1897         /* We don't subtract dir_count for the first send since we
1898          * might have one or more dot dirs which need to get sent. */
1899         flist->ndx_end = flist->ndx_start + flist->used - 1;
1900
1901         if (!numeric_ids && !inc_recurse)
1902                 send_id_list(f);
1903
1904         /* send the io_error flag */
1905         if (protocol_version < 30)
1906                 write_int(f, ignore_errors ? 0 : io_error);
1907         else if (io_error && !ignore_errors)
1908                 send_msg_int(MSG_IO_ERROR, io_error);
1909
1910         if (disable_buffering)
1911                 io_end_buffering_out();
1912
1913         stats.flist_size = stats.total_written - start_write;
1914         stats.num_files = flist->used;
1915
1916         if (verbose > 3)
1917                 output_flist(flist);
1918
1919         if (verbose > 2)
1920                 rprintf(FINFO, "send_file_list done\n");
1921
1922         if (inc_recurse) {
1923                 add_dirs_to_tree(-1, flist, dir_count);
1924                 flist_done_allocating(flist);
1925                 if (send_dir_ndx < 0) {
1926                         write_ndx(f, NDX_FLIST_EOF);
1927                         flist_eof = 1;
1928                 }
1929                 else if (file_total == 1) {
1930                         /* If we're creating incremental file-lists and there
1931                          * was just 1 item in the first file-list, send 1 more
1932                          * file-list to check if this is a 1-file xfer. */
1933                         send_extra_file_list(f, 1);
1934                 }
1935         }
1936
1937         return flist;
1938 }
1939
1940 struct file_list *recv_file_list(int f)
1941 {
1942         struct file_list *flist;
1943         int dstart, flags;
1944         int64 start_read;
1945
1946         if (!first_flist)
1947                 rprintf(FLOG, "receiving file list\n");
1948         if (show_filelist_p())
1949                 start_filelist_progress("receiving file list");
1950         else if (inc_recurse && verbose && !am_server && !first_flist)
1951                 rprintf(FCLIENT, "receiving incremental file list\n");
1952
1953         start_read = stats.total_read;
1954
1955         flist = flist_new(0, "recv_file_list");
1956
1957 #ifdef SUPPORT_HARD_LINKS
1958         if (preserve_hard_links && protocol_version < 30)
1959                 init_hard_links();
1960 #endif
1961
1962         if (inc_recurse) {
1963                 if (flist->ndx_start == 0)
1964                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1965                 dstart = dir_flist->used;
1966         } else {
1967                 dir_flist = flist;
1968                 dstart = 0;
1969         }
1970
1971         while ((flags = read_byte(f)) != 0) {
1972                 struct file_struct *file;
1973
1974                 flist_expand(flist, 1);
1975
1976                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1977                         flags |= read_byte(f) << 8;
1978                 file = recv_file_entry(flist, flags, f);
1979
1980                 if (inc_recurse && S_ISDIR(file->mode)) {
1981                         flist_expand(dir_flist, 1);
1982                         dir_flist->files[dir_flist->used++] = file;
1983                 }
1984
1985                 flist->files[flist->used++] = file;
1986
1987                 maybe_emit_filelist_progress(flist->used);
1988
1989                 if (verbose > 2) {
1990                         rprintf(FINFO, "recv_file_name(%s)\n",
1991                                 f_name(file, NULL));
1992                 }
1993         }
1994         file_total += flist->used;
1995
1996         flist->ndx_end = flist->ndx_start + flist->used - 1;
1997         if (inc_recurse && flist->ndx_start)
1998                 flist->ndx_end -= dir_flist->used - dstart;
1999
2000         if (verbose > 2)
2001                 rprintf(FINFO, "received %d names\n", flist->used);
2002
2003         if (show_filelist_p())
2004                 finish_filelist_progress(flist);
2005
2006 #ifdef ICONV_OPTION
2007         if (need_unsorted_flist) {
2008                 /* Create an extra array of index pointers that we can sort for
2009                  * the generator's use (for wading through the files in sorted
2010                  * order and for calling flist_find()).  We keep the "files"
2011                  * list unsorted for our exchange of index numbers with the
2012                  * other side (since their names may not sort the same). */
2013                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2014                         out_of_memory("recv_file_list");
2015                 memcpy(flist->sorted, flist->files,
2016                        flist->used * sizeof (struct file_struct*));
2017                 if (inc_recurse && dir_flist->used > dstart) {
2018                         dir_flist->sorted = realloc_array(dir_flist->sorted,
2019                                                 struct file_struct *,
2020                                                 dir_flist->used);
2021                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2022                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2023                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2024                 }
2025         } else
2026 #endif
2027         {
2028                 flist->sorted = flist->files;
2029                 if (inc_recurse && dir_flist->used > dstart) {
2030                         dir_flist->sorted = dir_flist->files;
2031                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2032                 }
2033         }
2034
2035         if (inc_recurse)
2036                 flist_done_allocating(flist);
2037         else if (f >= 0)
2038                 recv_id_list(f, flist);
2039
2040         clean_flist(flist, relative_paths);
2041
2042         if (protocol_version < 30) {
2043                 /* Recv the io_error flag */
2044                 if (ignore_errors)
2045                         read_int(f);
2046                 else
2047                         io_error |= read_int(f);
2048         }
2049
2050         if (verbose > 3)
2051                 output_flist(flist);
2052
2053         if (list_only) {
2054                 int i;
2055                 for (i = flist->low; i <= flist->high; i++)
2056                         list_file_entry(flist->files[i]);
2057         }
2058
2059         if (verbose > 2)
2060                 rprintf(FINFO, "recv_file_list done\n");
2061
2062         stats.flist_size += stats.total_read - start_read;
2063         stats.num_files += flist->used;
2064
2065         return flist;
2066 }
2067
2068 /* This is only used once by the receiver if the very first file-list
2069  * has exactly one item in it. */
2070 void recv_additional_file_list(int f)
2071 {
2072         struct file_list *flist;
2073         int ndx = read_ndx(f);
2074         if (ndx == NDX_FLIST_EOF) {
2075                 flist_eof = 1;
2076                 change_local_filter_dir(NULL, 0, 0);
2077         } else {
2078                 ndx = NDX_FLIST_OFFSET - ndx;
2079                 if (ndx < 0 || ndx >= dir_flist->used) {
2080                         ndx = NDX_FLIST_OFFSET - ndx;
2081                         rprintf(FERROR,
2082                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2083                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2084                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2085                         exit_cleanup(RERR_PROTOCOL);
2086                 }
2087                 if (verbose > 3) {
2088                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2089                                 who_am_i(), ndx);
2090                 }
2091                 flist = recv_file_list(f);
2092                 flist->parent_ndx = ndx;
2093         }
2094 }
2095
2096 /* Search for an identically-named item in the file list.  Note that the
2097  * items must agree in their directory-ness, or no match is returned. */
2098 int flist_find(struct file_list *flist, struct file_struct *f)
2099 {
2100         int low = flist->low, high = flist->high;
2101         int diff, mid, mid_up;
2102
2103         while (low <= high) {
2104                 mid = (low + high) / 2;
2105                 if (F_IS_ACTIVE(flist->sorted[mid]))
2106                         mid_up = mid;
2107                 else {
2108                         /* Scan for the next non-empty entry using the cached
2109                          * distance values.  If the value isn't fully up-to-
2110                          * date, update it. */
2111                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2112                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2113                                 do {
2114                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2115                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2116                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2117                         }
2118                         if (mid_up > high) {
2119                                 /* If there's nothing left above us, set high to
2120                                  * a non-empty entry below us and continue. */
2121                                 high = mid - (int)flist->sorted[mid]->len32;
2122                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2123                                         do {
2124                                             high -= (int)flist->sorted[high]->len32;
2125                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2126                                         flist->sorted[mid]->len32 = mid - high;
2127                                 }
2128                                 continue;
2129                         }
2130                 }
2131                 diff = f_name_cmp(flist->sorted[mid_up], f);
2132                 if (diff == 0) {
2133                         if (protocol_version < 29
2134                             && S_ISDIR(flist->sorted[mid_up]->mode)
2135                             != S_ISDIR(f->mode))
2136                                 return -1;
2137                         return mid_up;
2138                 }
2139                 if (diff < 0)
2140                         low = mid_up + 1;
2141                 else
2142                         high = mid - 1;
2143         }
2144         return -1;
2145 }
2146
2147 /*
2148  * Free up any resources a file_struct has allocated
2149  * and clear the file.
2150  */
2151 void clear_file(struct file_struct *file)
2152 {
2153         /* The +1 zeros out the first char of the basename. */
2154         memset(file, 0, FILE_STRUCT_LEN + 1);
2155         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2156          * entry.  Likewise for len32 in the opposite direction.  We assume
2157          * that we're alone for now since flist_find() will adjust the counts
2158          * it runs into that aren't up-to-date. */
2159         file->len32 = F_DEPTH(file) = 1;
2160 }
2161
2162 /* Allocate a new file list. */
2163 struct file_list *flist_new(int flags, char *msg)
2164 {
2165         struct file_list *flist;
2166
2167         flist = new(struct file_list);
2168         if (!flist)
2169                 out_of_memory(msg);
2170
2171         memset(flist, 0, sizeof flist[0]);
2172
2173         if (flags & FLIST_TEMP) {
2174                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2175                                                 out_of_memory, POOL_INTERN)))
2176                         out_of_memory(msg);
2177         } else {
2178                 /* This is a doubly linked list with prev looping back to
2179                  * the end of the list, but the last next pointer is NULL. */
2180                 if (!first_flist) {
2181                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2182                                                 out_of_memory, POOL_INTERN);
2183                         if (!flist->file_pool)
2184                                 out_of_memory(msg);
2185
2186                         first_flist = cur_flist = flist->prev = flist;
2187                 } else {
2188                         flist->file_pool = first_flist->file_pool;
2189
2190                         flist->ndx_start = first_flist->prev->ndx_end + 2;
2191
2192                         flist->prev = first_flist->prev;
2193                         flist->prev->next = first_flist->prev = flist;
2194                 }
2195                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2196                 flist_cnt++;
2197         }
2198
2199         return flist;
2200 }
2201
2202 /* Free up all elements in a flist. */
2203 void flist_free(struct file_list *flist)
2204 {
2205         if (!flist->prev) {
2206                 /* Was FLIST_TEMP dir-list. */
2207         } else if (flist == flist->prev) {
2208                 first_flist = cur_flist = NULL;
2209                 file_total = 0;
2210                 flist_cnt = 0;
2211         } else {
2212                 if (flist == cur_flist)
2213                         cur_flist = flist->next;
2214                 if (flist == first_flist)
2215                         first_flist = first_flist->next;
2216                 else {
2217                         flist->prev->next = flist->next;
2218                         if (!flist->next)
2219                                 flist->next = first_flist;
2220                 }
2221                 flist->next->prev = flist->prev;
2222                 file_total -= flist->used;
2223                 flist_cnt--;
2224         }
2225
2226         if (!flist->prev || !flist_cnt)
2227                 pool_destroy(flist->file_pool);
2228         else
2229                 pool_free_old(flist->file_pool, flist->pool_boundary);
2230
2231         if (flist->sorted && flist->sorted != flist->files)
2232                 free(flist->sorted);
2233         free(flist->files);
2234         free(flist);
2235 }
2236
2237 /* This routine ensures we don't have any duplicate names in our file list.
2238  * duplicate names can cause corruption because of the pipelining. */
2239 static void clean_flist(struct file_list *flist, int strip_root)
2240 {
2241         char fbuf[MAXPATHLEN];
2242         int i, prev_i;
2243
2244         if (!flist)
2245                 return;
2246         if (flist->used == 0) {
2247                 flist->high = -1;
2248                 flist->low = 0;
2249                 return;
2250         }
2251
2252         fsort(flist->sorted, flist->used);
2253
2254         if (!am_sender || inc_recurse) {
2255                 for (i = prev_i = 0; i < flist->used; i++) {
2256                         if (F_IS_ACTIVE(flist->sorted[i])) {
2257                                 prev_i = i;
2258                                 break;
2259                         }
2260                 }
2261                 flist->low = prev_i;
2262         } else {
2263                 i = prev_i = flist->used - 1;
2264                 flist->low = 0;
2265         }
2266
2267         while (++i < flist->used) {
2268                 int j;
2269                 struct file_struct *file = flist->sorted[i];
2270
2271                 if (!F_IS_ACTIVE(file))
2272                         continue;
2273                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2274                         j = prev_i;
2275                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2276                         int save_mode = file->mode;
2277                         /* Make sure that this directory doesn't duplicate a
2278                          * non-directory earlier in the list. */
2279                         flist->high = prev_i;
2280                         file->mode = S_IFREG;
2281                         j = flist_find(flist, file);
2282                         file->mode = save_mode;
2283                 } else
2284                         j = -1;
2285                 if (j >= 0) {
2286                         int keep, drop;
2287                         /* If one is a dir and the other is not, we want to
2288                          * keep the dir because it might have contents in the
2289                          * list. */
2290                         if (S_ISDIR(file->mode)) {
2291                                 struct file_struct *fp = flist->sorted[j];
2292                                 if (!S_ISDIR(fp->mode))
2293                                         keep = i, drop = j;
2294                                 else
2295                                         keep = j, drop = i;
2296                         } else
2297                                 keep = j, drop = i;
2298
2299                         if (am_sender)
2300                                 flist->sorted[drop]->flags |= FLAG_DUPLICATE;
2301                         else {
2302                                 if (verbose > 1) {
2303                                         rprintf(FINFO,
2304                                             "removing duplicate name %s from file list (%d)\n",
2305                                             f_name(file, fbuf), drop + flist->ndx_start);
2306                                 }
2307                                 /* Make sure we don't lose track of a user-specified
2308                                  * top directory. */
2309                                 flist->sorted[keep]->flags |= flist->sorted[drop]->flags
2310                                                            & (FLAG_TOP_DIR|FLAG_XFER_DIR);
2311
2312                                 clear_file(flist->sorted[drop]);
2313                         }
2314
2315                         if (keep == i) {
2316                                 if (flist->low == drop) {
2317                                         for (j = drop + 1;
2318                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2319                                              j++) {}
2320                                         flist->low = j;
2321                                 }
2322                                 prev_i = i;
2323                         }
2324                 } else
2325                         prev_i = i;
2326         }
2327         flist->high = prev_i;
2328
2329         if (strip_root) {
2330                 /* We need to strip off the leading slashes for relative
2331                  * paths, but this must be done _after_ the sorting phase. */
2332                 for (i = flist->low; i <= flist->high; i++) {
2333                         struct file_struct *file = flist->sorted[i];
2334
2335                         if (!file->dirname)
2336                                 continue;
2337                         while (*file->dirname == '/')
2338                                 file->dirname++;
2339                         if (!*file->dirname)
2340                                 file->dirname = NULL;
2341                 }
2342         }
2343
2344         if (prune_empty_dirs && !am_sender) {
2345                 int j, prev_depth = 0;
2346
2347                 prev_i = 0; /* It's OK that this isn't really true. */
2348
2349                 for (i = flist->low; i <= flist->high; i++) {
2350                         struct file_struct *fp, *file = flist->sorted[i];
2351
2352                         /* This temporarily abuses the F_DEPTH() value for a
2353                          * directory that is in a chain that might get pruned.
2354                          * We restore the old value if it gets a reprieve. */
2355                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2356                                 /* Dump empty dirs when coming back down. */
2357                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2358                                         fp = flist->sorted[prev_i];
2359                                         if (F_DEPTH(fp) >= 0)
2360                                                 break;
2361                                         prev_i = -F_DEPTH(fp)-1;
2362                                         clear_file(fp);
2363                                 }
2364                                 prev_depth = F_DEPTH(file);
2365                                 if (is_excluded(f_name(file, fbuf), 1,
2366                                                        ALL_FILTERS)) {
2367                                         /* Keep dirs through this dir. */
2368                                         for (j = prev_depth-1; ; j--) {
2369                                                 fp = flist->sorted[prev_i];
2370                                                 if (F_DEPTH(fp) >= 0)
2371                                                         break;
2372                                                 prev_i = -F_DEPTH(fp)-1;
2373                                                 F_DEPTH(fp) = j;
2374                                         }
2375                                 } else
2376                                         F_DEPTH(file) = -prev_i-1;
2377                                 prev_i = i;
2378                         } else {
2379                                 /* Keep dirs through this non-dir. */
2380                                 for (j = prev_depth; ; j--) {
2381                                         fp = flist->sorted[prev_i];
2382                                         if (F_DEPTH(fp) >= 0)
2383                                                 break;
2384                                         prev_i = -F_DEPTH(fp)-1;
2385                                         F_DEPTH(fp) = j;
2386                                 }
2387                         }
2388                 }
2389                 /* Dump all remaining empty dirs. */
2390                 while (1) {
2391                         struct file_struct *fp = flist->sorted[prev_i];
2392                         if (F_DEPTH(fp) >= 0)
2393                                 break;
2394                         prev_i = -F_DEPTH(fp)-1;
2395                         clear_file(fp);
2396                 }
2397
2398                 for (i = flist->low; i <= flist->high; i++) {
2399                         if (F_IS_ACTIVE(flist->sorted[i]))
2400                                 break;
2401                 }
2402                 flist->low = i;
2403                 for (i = flist->high; i >= flist->low; i--) {
2404                         if (F_IS_ACTIVE(flist->sorted[i]))
2405                                 break;
2406                 }
2407                 flist->high = i;
2408         }
2409 }
2410
2411 static void output_flist(struct file_list *flist)
2412 {
2413         char uidbuf[16], gidbuf[16], depthbuf[16];
2414         struct file_struct *file;
2415         const char *root, *dir, *slash, *name, *trail;
2416         const char *who = who_am_i();
2417         int i;
2418
2419         rprintf(FINFO, "[%s] flist start=%d, end=%d, used=%d, low=%d, high=%d\n",
2420                 who, flist->ndx_start, flist->ndx_end, flist->used, flist->low, flist->high);
2421         for (i = 0; i < flist->used; i++) {
2422                 file = flist->sorted[i];
2423                 if ((am_root || am_sender) && uid_ndx) {
2424                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2425                                  F_OWNER(file));
2426                 } else
2427                         *uidbuf = '\0';
2428                 if (gid_ndx) {
2429                         static char parens[] = "(\0)\0\0\0";
2430                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2431                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2432                                  pp, F_GROUP(file), pp + 2);
2433                 } else
2434                         *gidbuf = '\0';
2435                 if (!am_sender)
2436                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2437                 if (F_IS_ACTIVE(file)) {
2438                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2439                         if ((dir = file->dirname) == NULL)
2440                                 dir = slash = "";
2441                         else
2442                                 slash = "/";
2443                         name = file->basename;
2444                         trail = S_ISDIR(file->mode) ? "/" : "";
2445                 } else
2446                         root = dir = slash = name = trail = "";
2447                 rprintf(FINFO,
2448                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2449                         who, i + flist->ndx_start,
2450                         root, dir, slash, name, trail,
2451                         (int)file->mode, (double)F_LENGTH(file),
2452                         uidbuf, gidbuf, file->flags);
2453         }
2454 }
2455
2456 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2457 enum fnc_type { t_PATH, t_ITEM };
2458
2459 static int found_prefix;
2460
2461 /* Compare the names of two file_struct entities, similar to how strcmp()
2462  * would do if it were operating on the joined strings.
2463  *
2464  * Some differences beginning with protocol_version 29: (1) directory names
2465  * are compared with an assumed trailing slash so that they compare in a
2466  * way that would cause them to sort immediately prior to any content they
2467  * may have; (2) a directory of any name compares after a non-directory of
2468  * any name at the same depth; (3) a directory with name "." compares prior
2469  * to anything else.  These changes mean that a directory and a non-dir
2470  * with the same name will not compare as equal (protocol_version >= 29).
2471  *
2472  * The dirname component can be an empty string, but the basename component
2473  * cannot (and never is in the current codebase).  The basename component
2474  * may be NULL (for a removed item), in which case it is considered to be
2475  * after any existing item. */
2476 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2477 {
2478         int dif;
2479         const uchar *c1, *c2;
2480         enum fnc_state state1, state2;
2481         enum fnc_type type1, type2;
2482         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2483
2484         if (!f1 || !F_IS_ACTIVE(f1)) {
2485                 if (!f2 || !F_IS_ACTIVE(f2))
2486                         return 0;
2487                 return -1;
2488         }
2489         if (!f2 || !F_IS_ACTIVE(f2))
2490                 return 1;
2491
2492         c1 = (uchar*)f1->dirname;
2493         c2 = (uchar*)f2->dirname;
2494         if (c1 == c2)
2495                 c1 = c2 = NULL;
2496         if (!c1) {
2497                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2498                 c1 = (const uchar*)f1->basename;
2499                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2500                         type1 = t_ITEM;
2501                         state1 = s_TRAILING;
2502                         c1 = (uchar*)"";
2503                 } else
2504                         state1 = s_BASE;
2505         } else {
2506                 type1 = t_path;
2507                 state1 = s_DIR;
2508         }
2509         if (!c2) {
2510                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2511                 c2 = (const uchar*)f2->basename;
2512                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2513                         type2 = t_ITEM;
2514                         state2 = s_TRAILING;
2515                         c2 = (uchar*)"";
2516                 } else
2517                         state2 = s_BASE;
2518         } else {
2519                 type2 = t_path;
2520                 state2 = s_DIR;
2521         }
2522
2523         if (type1 != type2)
2524                 return type1 == t_PATH ? 1 : -1;
2525
2526         do {
2527                 if (!*c1) {
2528                         switch (state1) {
2529                         case s_DIR:
2530                                 state1 = s_SLASH;
2531                                 c1 = (uchar*)"/";
2532                                 break;
2533                         case s_SLASH:
2534                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2535                                 c1 = (const uchar*)f1->basename;
2536                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2537                                         type1 = t_ITEM;
2538                                         state1 = s_TRAILING;
2539                                         c1 = (uchar*)"";
2540                                 } else
2541                                         state1 = s_BASE;
2542                                 break;
2543                         case s_BASE:
2544                                 state1 = s_TRAILING;
2545                                 if (type1 == t_PATH) {
2546                                         c1 = (uchar*)"/";
2547                                         break;
2548                                 }
2549                                 /* FALL THROUGH */
2550                         case s_TRAILING:
2551                                 type1 = t_ITEM;
2552                                 break;
2553                         }
2554                         if (*c2 && type1 != type2)
2555                                 return type1 == t_PATH ? 1 : -1;
2556                 }
2557                 if (!*c2) {
2558                         switch (state2) {
2559                         case s_DIR:
2560                                 state2 = s_SLASH;
2561                                 c2 = (uchar*)"/";
2562                                 break;
2563                         case s_SLASH:
2564                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2565                                 c2 = (const uchar*)f2->basename;
2566                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2567                                         type2 = t_ITEM;
2568                                         state2 = s_TRAILING;
2569                                         c2 = (uchar*)"";
2570                                 } else
2571                                         state2 = s_BASE;
2572                                 break;
2573                         case s_BASE:
2574                                 state2 = s_TRAILING;
2575                                 if (type2 == t_PATH) {
2576                                         c2 = (uchar*)"/";
2577                                         break;
2578                                 }
2579                                 /* FALL THROUGH */
2580                         case s_TRAILING:
2581                                 found_prefix = 1;
2582                                 if (!*c1)
2583                                         return 0;
2584                                 type2 = t_ITEM;
2585                                 break;
2586                         }
2587                         if (type1 != type2)
2588                                 return type1 == t_PATH ? 1 : -1;
2589                 }
2590         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2591
2592         return dif;
2593 }
2594
2595 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2596  * not match if f2's basename is not an exact match of a path element in f1.
2597  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2598 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2599 {
2600         found_prefix = 0;
2601         f_name_cmp(f1, f2);
2602         return found_prefix;
2603 }
2604
2605 char *f_name_buf(void)
2606 {
2607         static char names[5][MAXPATHLEN];
2608         static unsigned int n;
2609
2610         n = (n + 1) % (sizeof names / sizeof names[0]);
2611
2612         return names[n];
2613 }
2614
2615 /* Return a copy of the full filename of a flist entry, using the indicated
2616  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2617  * done because we checked the size when creating the file_struct entry.
2618  */
2619 char *f_name(const struct file_struct *f, char *fbuf)
2620 {
2621         if (!f || !F_IS_ACTIVE(f))
2622                 return NULL;
2623
2624         if (!fbuf)
2625                 fbuf = f_name_buf();
2626
2627         if (f->dirname) {
2628                 int len = strlen(f->dirname);
2629                 memcpy(fbuf, f->dirname, len);
2630                 fbuf[len] = '/';
2631                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2632         } else
2633                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2634
2635         return fbuf;
2636 }
2637
2638 /* Do a non-recursive scan of the named directory, possibly ignoring all
2639  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2640  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2641  * buffer (the functions we call will append names onto the end, but the old
2642  * dir value will be restored on exit). */
2643 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2644 {
2645         struct file_list *dirlist;
2646         char dirbuf[MAXPATHLEN];
2647         int save_recurse = recurse;
2648         int save_xfer_dirs = xfer_dirs;
2649         int save_prune_empty_dirs = prune_empty_dirs;
2650
2651         if (dlen < 0) {
2652                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2653                 if (dlen >= MAXPATHLEN)
2654                         return NULL;
2655                 dirname = dirbuf;
2656         }
2657
2658         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2659
2660         recurse = 0;
2661         xfer_dirs = 1;
2662         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2663         xfer_dirs = save_xfer_dirs;
2664         recurse = save_recurse;
2665         if (do_progress)
2666                 flist_count_offset += dirlist->used;
2667
2668         prune_empty_dirs = 0;
2669         dirlist->sorted = dirlist->files;
2670         clean_flist(dirlist, 0);
2671         prune_empty_dirs = save_prune_empty_dirs;
2672
2673         if (verbose > 3)
2674                 output_flist(dirlist);
2675
2676         return dirlist;
2677 }