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Fix a bug with --delete-after combined with --backup.
[rsync.git] / flist.c
blobfcfde84043591dc037a88fa1606130fc9a609188
1 /*
2 Copyright (C) Andrew Tridgell 1996
3 Copyright (C) Paul Mackerras 1996
4 Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 /** @file flist.c
22 * Generate and receive file lists
23 *
24 * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
25 *
26 **/
27
28 #include "rsync.h"
29
30 extern int verbose;
31 extern int dry_run;
32 extern int list_only;
33 extern int am_root;
34 extern int am_server;
35 extern int am_daemon;
36 extern int am_sender;
37 extern int do_progress;
38 extern int always_checksum;
39 extern int module_id;
40 extern int ignore_errors;
41 extern int numeric_ids;
42 extern int recurse;
43 extern int xfer_dirs;
44 extern int filesfrom_fd;
45 extern int one_file_system;
46 extern int keep_dirlinks;
47 extern int preserve_links;
48 extern int preserve_hard_links;
49 extern int preserve_perms;
50 extern int preserve_devices;
51 extern int preserve_uid;
52 extern int preserve_gid;
53 extern int relative_paths;
54 extern int implied_dirs;
55 extern int copy_links;
56 extern int copy_unsafe_links;
57 extern int protocol_version;
58 extern int sanitize_paths;
59 extern int orig_umask;
60 extern struct stats stats;
61 extern struct file_list *the_file_list;
62
63 extern char curr_dir[MAXPATHLEN];
64
65 extern struct filter_list_struct filter_list;
66 extern struct filter_list_struct server_filter_list;
67
68 int io_error;
69 dev_t filesystem_dev; /* used to implement -x */
70
71 static char empty_sum[MD4_SUM_LENGTH];
72 static int flist_count_offset;
73 static unsigned int file_struct_len;
74 static struct file_list *sorting_flist;
75
76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
77 static void output_flist(struct file_list *flist);
78
79 void init_flist(void)
80 {
81 struct file_struct f;
82
83 /* Figure out how big the file_struct is without trailing padding */
84 file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
85 }
86
87
88 static int show_filelist_p(void)
89 {
90 return verbose && xfer_dirs && !am_server;
91 }
92
93 static void start_filelist_progress(char *kind)
94 {
95 rprintf(FINFO, "%s ... ", kind);
96 if (verbose > 1 || do_progress)
97 rprintf(FINFO, "\n");
98 rflush(FINFO);
99 }
100
101
102 static void emit_filelist_progress(int count)
103 {
104 rprintf(FINFO, " %d files...\r", count);
105 }
106
107
108 static void maybe_emit_filelist_progress(int count)
109 {
110 if (do_progress && show_filelist_p() && (count % 100) == 0)
111 emit_filelist_progress(count);
112 }
113
114
115 static void finish_filelist_progress(const struct file_list *flist)
116 {
117 if (do_progress) {
118 /* This overwrites the progress line */
119 rprintf(FINFO, "%d file%sto consider\n",
120 flist->count, flist->count == 1 ? " " : "s ");
121 } else
122 rprintf(FINFO, "done\n");
123 }
124
125 void show_flist_stats(void)
126 {
127 /* Nothing yet */
128 }
129
130
131 static void list_file_entry(struct file_struct *f)
132 {
133 char perms[11];
134
135 if (!f->basename) {
136 /* this can happen if duplicate names were removed */
137 return;
138 }
139
140 permstring(perms, f->mode);
141
142 #ifdef SUPPORT_LINKS
143 if (preserve_links && S_ISLNK(f->mode)) {
144 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
145 perms,
146 (double)f->length, timestring(f->modtime),
147 safe_fname(f_name(f)), safe_fname(f->u.link));
148 } else
149 #endif
150 {
151 rprintf(FINFO, "%s %11.0f %s %s\n",
152 perms,
153 (double)f->length, timestring(f->modtime),
154 safe_fname(f_name(f)));
155 }
156 }
157
158
159 /**
160 * Stat either a symlink or its referent, depending on the settings of
161 * copy_links, copy_unsafe_links, etc.
162 *
163 * @retval -1 on error
164 *
165 * @retval 0 for success
166 *
167 * @post If @p path is a symlink, then @p linkbuf (of size @c
168 * MAXPATHLEN) contains the symlink target.
169 *
170 * @post @p buffer contains information about the link or the
171 * referrent as appropriate, if they exist.
172 **/
173 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
174 {
175 #ifdef SUPPORT_LINKS
176 if (copy_links)
177 return do_stat(path, buffer);
178 if (link_stat(path, buffer, 0) < 0)
179 return -1;
180 if (S_ISLNK(buffer->st_mode)) {
181 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
182 if (l == -1)
183 return -1;
184 linkbuf[l] = 0;
185 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
186 if (verbose > 1) {
187 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
188 safe_fname(path), safe_fname(linkbuf));
189 }
190 return do_stat(path, buffer);
191 }
192 }
193 return 0;
194 #else
195 return do_stat(path, buffer);
196 #endif
197 }
198
199 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
200 {
201 #ifdef SUPPORT_LINKS
202 if (copy_links)
203 return do_stat(path, buffer);
204 if (do_lstat(path, buffer) < 0)
205 return -1;
206 if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
207 STRUCT_STAT st;
208 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
209 *buffer = st;
210 }
211 return 0;
212 #else
213 return do_stat(path, buffer);
214 #endif
215 }
216
217 /* This function is used to check if a file should be included/excluded
218 * from the list of files based on its name and type etc. The value of
219 * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
220 static int is_excluded(char *fname, int is_dir, int filter_level)
221 {
222 #if 0 /* This currently never happens, so avoid a useless compare. */
223 if (filter_level == NO_FILTERS)
224 return 0;
225 #endif
226 if (fname) {
227 /* never exclude '.', even if somebody does --exclude '*' */
228 if (fname[0] == '.' && !fname[1])
229 return 0;
230 /* Handle the -R version of the '.' dir. */
231 if (fname[0] == '/') {
232 int len = strlen(fname);
233 if (fname[len-1] == '.' && fname[len-2] == '/')
234 return 0;
235 }
236 }
237 if (server_filter_list.head
238 && check_filter(&server_filter_list, fname, is_dir) < 0)
239 return 1;
240 if (filter_level != ALL_FILTERS)
241 return 0;
242 if (filter_list.head
243 && check_filter(&filter_list, fname, is_dir) < 0)
244 return 1;
245 return 0;
246 }
247
248 static int to_wire_mode(mode_t mode)
249 {
250 #ifdef SUPPORT_LINKS
251 if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
252 return (mode & ~(_S_IFMT)) | 0120000;
253 #endif
254 return (int)mode;
255 }
256
257 static mode_t from_wire_mode(int mode)
258 {
259 if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
260 return (mode & ~(_S_IFMT)) | _S_IFLNK;
261 return (mode_t)mode;
262 }
263
264
265 static void send_directory(int f, struct file_list *flist,
266 char *fbuf, int len);
267
268 static char *flist_dir;
269 static int flist_dir_len;
270
271
272 /**
273 * Make sure @p flist is big enough to hold at least @p flist->count
274 * entries.
275 **/
276 void flist_expand(struct file_list *flist)
277 {
278 struct file_struct **new_ptr;
279
280 if (flist->count < 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 /*
291 * In case count jumped or we are starting the list
292 * with a known size just set it.
293 */
294 if (flist->malloced < flist->count)
295 flist->malloced = flist->count;
296
297 new_ptr = realloc_array(flist->files, struct file_struct *,
298 flist->malloced);
299
300 if (verbose >= 2 && flist->malloced != FLIST_START) {
301 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
302 who_am_i(),
303 (double)sizeof flist->files[0] * flist->malloced,
304 (new_ptr == flist->files) ? " not" : "");
305 }
306
307 flist->files = new_ptr;
308
309 if (!flist->files)
310 out_of_memory("flist_expand");
311 }
312
313 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
314 {
315 unsigned short flags;
316 static time_t modtime;
317 static mode_t mode;
318 static int64 dev;
319 static dev_t rdev;
320 static uint32 rdev_major;
321 static uid_t uid;
322 static gid_t gid;
323 static char lastname[MAXPATHLEN];
324 char fname[MAXPATHLEN];
325 int l1, l2;
326
327 if (f < 0)
328 return;
329
330 if (!file) {
331 write_byte(f, 0);
332 modtime = 0, mode = 0;
333 dev = 0, rdev = makedev(0, 0);
334 rdev_major = 0;
335 uid = 0, gid = 0;
336 *lastname = '\0';
337 return;
338 }
339
340 io_write_phase = "send_file_entry";
341
342 f_name_to(file, fname);
343
344 flags = base_flags;
345
346 if (file->mode == mode)
347 flags |= XMIT_SAME_MODE;
348 else
349 mode = file->mode;
350 if (preserve_devices) {
351 if (protocol_version < 28) {
352 if (IS_DEVICE(mode)) {
353 if (file->u.rdev == rdev)
354 flags |= XMIT_SAME_RDEV_pre28;
355 else
356 rdev = file->u.rdev;
357 } else
358 rdev = makedev(0, 0);
359 } else if (IS_DEVICE(mode)) {
360 rdev = file->u.rdev;
361 if ((uint32)major(rdev) == rdev_major)
362 flags |= XMIT_SAME_RDEV_MAJOR;
363 else
364 rdev_major = major(rdev);
365 if ((uint32)minor(rdev) <= 0xFFu)
366 flags |= XMIT_RDEV_MINOR_IS_SMALL;
367 }
368 }
369 if (file->uid == uid)
370 flags |= XMIT_SAME_UID;
371 else
372 uid = file->uid;
373 if (file->gid == gid)
374 flags |= XMIT_SAME_GID;
375 else
376 gid = file->gid;
377 if (file->modtime == modtime)
378 flags |= XMIT_SAME_TIME;
379 else
380 modtime = file->modtime;
381
382 #ifdef SUPPORT_HARD_LINKS
383 if (file->link_u.idev) {
384 if (file->F_DEV == dev) {
385 if (protocol_version >= 28)
386 flags |= XMIT_SAME_DEV;
387 } else
388 dev = file->F_DEV;
389 flags |= XMIT_HAS_IDEV_DATA;
390 }
391 #endif
392
393 for (l1 = 0;
394 lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
395 l1++) {}
396 l2 = strlen(fname+l1);
397
398 if (l1 > 0)
399 flags |= XMIT_SAME_NAME;
400 if (l2 > 255)
401 flags |= XMIT_LONG_NAME;
402
403 /* We must make sure we don't send a zero flag byte or the
404 * other end will terminate the flist transfer. Note that
405 * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
406 * it's harmless way to add a bit to the first flag byte. */
407 if (protocol_version >= 28) {
408 if (!flags && !S_ISDIR(mode))
409 flags |= XMIT_TOP_DIR;
410 if ((flags & 0xFF00) || !flags) {
411 flags |= XMIT_EXTENDED_FLAGS;
412 write_byte(f, flags);
413 write_byte(f, flags >> 8);
414 } else
415 write_byte(f, flags);
416 } else {
417 if (!(flags & 0xFF) && !S_ISDIR(mode))
418 flags |= XMIT_TOP_DIR;
419 if (!(flags & 0xFF))
420 flags |= XMIT_LONG_NAME;
421 write_byte(f, flags);
422 }
423 if (flags & XMIT_SAME_NAME)
424 write_byte(f, l1);
425 if (flags & XMIT_LONG_NAME)
426 write_int(f, l2);
427 else
428 write_byte(f, l2);
429 write_buf(f, fname + l1, l2);
430
431 write_longint(f, file->length);
432 if (!(flags & XMIT_SAME_TIME))
433 write_int(f, modtime);
434 if (!(flags & XMIT_SAME_MODE))
435 write_int(f, to_wire_mode(mode));
436 if (preserve_uid && !(flags & XMIT_SAME_UID)) {
437 if (!numeric_ids)
438 add_uid(uid);
439 write_int(f, uid);
440 }
441 if (preserve_gid && !(flags & XMIT_SAME_GID)) {
442 if (!numeric_ids)
443 add_gid(gid);
444 write_int(f, gid);
445 }
446 if (preserve_devices && IS_DEVICE(mode)) {
447 if (protocol_version < 28) {
448 if (!(flags & XMIT_SAME_RDEV_pre28))
449 write_int(f, (int)rdev);
450 } else {
451 if (!(flags & XMIT_SAME_RDEV_MAJOR))
452 write_int(f, major(rdev));
453 if (flags & XMIT_RDEV_MINOR_IS_SMALL)
454 write_byte(f, minor(rdev));
455 else
456 write_int(f, minor(rdev));
457 }
458 }
459
460 #ifdef SUPPORT_LINKS
461 if (preserve_links && S_ISLNK(mode)) {
462 int len = strlen(file->u.link);
463 write_int(f, len);
464 write_buf(f, file->u.link, len);
465 }
466 #endif
467
468 #ifdef SUPPORT_HARD_LINKS
469 if (flags & XMIT_HAS_IDEV_DATA) {
470 if (protocol_version < 26) {
471 /* 32-bit dev_t and ino_t */
472 write_int(f, dev);
473 write_int(f, file->F_INODE);
474 } else {
475 /* 64-bit dev_t and ino_t */
476 if (!(flags & XMIT_SAME_DEV))
477 write_longint(f, dev);
478 write_longint(f, file->F_INODE);
479 }
480 }
481 #endif
482
483 if (always_checksum) {
484 char *sum;
485 if (S_ISREG(mode))
486 sum = file->u.sum;
487 else if (protocol_version < 28) {
488 /* Prior to 28, we sent a useless set of nulls. */
489 sum = empty_sum;
490 } else
491 sum = NULL;
492 if (sum) {
493 write_buf(f, sum,
494 protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
495 }
496 }
497
498 strlcpy(lastname, fname, MAXPATHLEN);
499
500 io_write_phase = "unknown";
501 }
502
503
504
505 static struct file_struct *receive_file_entry(struct file_list *flist,
506 unsigned short flags, int f)
507 {
508 static time_t modtime;
509 static mode_t mode;
510 static int64 dev;
511 static dev_t rdev;
512 static uint32 rdev_major;
513 static uid_t uid;
514 static gid_t gid;
515 static char lastname[MAXPATHLEN], *lastdir;
516 static int lastdir_depth, lastdir_len = -1;
517 static unsigned int del_hier_name_len = 0;
518 static int in_del_hier = 0;
519 char thisname[MAXPATHLEN];
520 unsigned int l1 = 0, l2 = 0;
521 int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
522 OFF_T file_length;
523 char *basename, *dirname, *bp;
524 struct file_struct *file;
525
526 if (!flist) {
527 modtime = 0, mode = 0;
528 dev = 0, rdev = makedev(0, 0);
529 rdev_major = 0;
530 uid = 0, gid = 0;
531 *lastname = '\0';
532 lastdir_len = -1;
533 in_del_hier = 0;
534 return NULL;
535 }
536
537 if (flags & XMIT_SAME_NAME)
538 l1 = read_byte(f);
539
540 if (flags & XMIT_LONG_NAME)
541 l2 = read_int(f);
542 else
543 l2 = read_byte(f);
544
545 if (l2 >= MAXPATHLEN - l1) {
546 rprintf(FERROR,
547 "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
548 flags, l1, l2, safe_fname(lastname));
549 overflow("receive_file_entry");
550 }
551
552 strlcpy(thisname, lastname, l1 + 1);
553 read_sbuf(f, &thisname[l1], l2);
554 thisname[l1 + l2] = 0;
555
556 strlcpy(lastname, thisname, MAXPATHLEN);
557
558 clean_fname(thisname, 0);
559
560 if (sanitize_paths)
561 sanitize_path(thisname, thisname, "", 0);
562
563 if ((basename = strrchr(thisname, '/')) != NULL) {
564 dirname_len = ++basename - thisname; /* counts future '\0' */
565 if (lastdir_len == dirname_len - 1
566 && strncmp(thisname, lastdir, lastdir_len) == 0) {
567 dirname = lastdir;
568 dirname_len = 0; /* indicates no copy is needed */
569 } else
570 dirname = thisname;
571 } else {
572 basename = thisname;
573 dirname = NULL;
574 dirname_len = 0;
575 }
576 basename_len = strlen(basename) + 1; /* count the '\0' */
577
578 file_length = read_longint(f);
579 if (!(flags & XMIT_SAME_TIME))
580 modtime = (time_t)read_int(f);
581 if (!(flags & XMIT_SAME_MODE))
582 mode = from_wire_mode(read_int(f));
583
584 if (preserve_uid && !(flags & XMIT_SAME_UID))
585 uid = (uid_t)read_int(f);
586 if (preserve_gid && !(flags & XMIT_SAME_GID))
587 gid = (gid_t)read_int(f);
588
589 if (preserve_devices) {
590 if (protocol_version < 28) {
591 if (IS_DEVICE(mode)) {
592 if (!(flags & XMIT_SAME_RDEV_pre28))
593 rdev = (dev_t)read_int(f);
594 } else
595 rdev = makedev(0, 0);
596 } else if (IS_DEVICE(mode)) {
597 uint32 rdev_minor;
598 if (!(flags & XMIT_SAME_RDEV_MAJOR))
599 rdev_major = read_int(f);
600 if (flags & XMIT_RDEV_MINOR_IS_SMALL)
601 rdev_minor = read_byte(f);
602 else
603 rdev_minor = read_int(f);
604 rdev = makedev(rdev_major, rdev_minor);
605 }
606 }
607
608 #ifdef SUPPORT_LINKS
609 if (preserve_links && S_ISLNK(mode)) {
610 linkname_len = read_int(f) + 1; /* count the '\0' */
611 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
612 rprintf(FERROR, "overflow: linkname_len=%d\n",
613 linkname_len - 1);
614 overflow("receive_file_entry");
615 }
616 }
617 else
618 #endif
619 linkname_len = 0;
620
621 sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
622
623 alloc_len = file_struct_len + dirname_len + basename_len
624 + linkname_len + sum_len;
625 bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
626
627 file = (struct file_struct *)bp;
628 memset(bp, 0, file_struct_len);
629 bp += file_struct_len;
630
631 file->flags = 0;
632 file->modtime = modtime;
633 file->length = file_length;
634 file->mode = mode;
635 file->uid = uid;
636 file->gid = gid;
637
638 if (dirname_len) {
639 file->dirname = lastdir = bp;
640 lastdir_len = dirname_len - 1;
641 memcpy(bp, dirname, dirname_len - 1);
642 bp += dirname_len;
643 bp[-1] = '\0';
644 lastdir_depth = count_dir_elements(lastdir);
645 file->dir.depth = lastdir_depth + 1;
646 } else if (dirname) {
647 file->dirname = dirname; /* we're reusing lastname */
648 file->dir.depth = lastdir_depth + 1;
649 } else
650 file->dir.depth = 1;
651
652 if (S_ISDIR(mode)) {
653 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
654 file->dir.depth--;
655 if (flags & XMIT_TOP_DIR) {
656 in_del_hier = 1;
657 del_hier_name_len = file->dir.depth == 0 ? 0 : l1 + l2;
658 file->flags |= FLAG_TOP_DIR | FLAG_DEL_HERE;
659 } else if (in_del_hier) {
660 if (!relative_paths || !del_hier_name_len
661 || (l1 >= del_hier_name_len
662 && thisname[del_hier_name_len] == '/'))
663 file->flags |= FLAG_DEL_HERE;
664 else
665 in_del_hier = 0;
666 }
667 }
668
669 file->basename = bp;
670 memcpy(bp, basename, basename_len);
671 bp += basename_len;
672
673 if (preserve_devices && IS_DEVICE(mode))
674 file->u.rdev = rdev;
675
676 #ifdef SUPPORT_LINKS
677 if (linkname_len) {
678 file->u.link = bp;
679 read_sbuf(f, bp, linkname_len - 1);
680 if (sanitize_paths)
681 sanitize_path(bp, bp, "", lastdir_depth);
682 bp += linkname_len;
683 }
684 #endif
685
686 #ifdef SUPPORT_HARD_LINKS
687 if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
688 flags |= XMIT_HAS_IDEV_DATA;
689 if (flags & XMIT_HAS_IDEV_DATA) {
690 int64 inode;
691 if (protocol_version < 26) {
692 dev = read_int(f);
693 inode = read_int(f);
694 } else {
695 if (!(flags & XMIT_SAME_DEV))
696 dev = read_longint(f);
697 inode = read_longint(f);
698 }
699 if (flist->hlink_pool) {
700 file->link_u.idev = pool_talloc(flist->hlink_pool,
701 struct idev, 1, "inode_table");
702 file->F_INODE = inode;
703 file->F_DEV = dev;
704 }
705 }
706 #endif
707
708 if (always_checksum) {
709 char *sum;
710 if (sum_len) {
711 file->u.sum = sum = bp;
712 /*bp += sum_len;*/
713 } else if (protocol_version < 28) {
714 /* Prior to 28, we get a useless set of nulls. */
715 sum = empty_sum;
716 } else
717 sum = NULL;
718 if (sum) {
719 read_buf(f, sum,
720 protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
721 }
722 }
723
724 if (!preserve_perms) {
725 /* set an appropriate set of permissions based on original
726 * permissions and umask. This emulates what GNU cp does */
727 file->mode &= ~orig_umask;
728 }
729
730 return file;
731 }
732
733
734 /**
735 * Create a file_struct for a named file by reading its stat()
736 * information and performing extensive checks against global
737 * options.
738 *
739 * @return the new file, or NULL if there was an error or this file
740 * should be excluded.
741 *
742 * @todo There is a small optimization opportunity here to avoid
743 * stat()ing the file in some circumstances, which has a certain cost.
744 * We are called immediately after doing readdir(), and so we may
745 * already know the d_type of the file. We could for example avoid
746 * statting directories if we're not recursing, but this is not a very
747 * important case. Some systems may not have d_type.
748 **/
749 struct file_struct *make_file(char *fname, struct file_list *flist,
750 int filter_level)
751 {
752 static char *lastdir;
753 static int lastdir_len = -1;
754 struct file_struct *file;
755 STRUCT_STAT st;
756 char sum[SUM_LENGTH];
757 char thisname[MAXPATHLEN];
758 char linkname[MAXPATHLEN];
759 int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
760 char *basename, *dirname, *bp;
761 unsigned short flags = 0;
762
763 if (!flist || !flist->count) /* Ignore lastdir when invalid. */
764 lastdir_len = -1;
765
766 if (strlcpy(thisname, fname, sizeof thisname)
767 >= sizeof thisname - flist_dir_len) {
768 rprintf(FINFO, "skipping overly long name: %s\n",
769 safe_fname(fname));
770 return NULL;
771 }
772 clean_fname(thisname, 0);
773 if (sanitize_paths)
774 sanitize_path(thisname, thisname, "", 0);
775
776 memset(sum, 0, SUM_LENGTH);
777
778 if (readlink_stat(thisname, &st, linkname) != 0) {
779 int save_errno = errno;
780 /* See if file is excluded before reporting an error. */
781 if (filter_level != NO_FILTERS
782 && is_excluded(thisname, 0, filter_level))
783 return NULL;
784 if (save_errno == ENOENT) {
785 #ifdef SUPPORT_LINKS
786 /* Avoid "vanished" error if symlink points nowhere. */
787 if (copy_links && do_lstat(thisname, &st) == 0
788 && S_ISLNK(st.st_mode)) {
789 io_error |= IOERR_GENERAL;
790 rprintf(FERROR, "symlink has no referent: %s\n",
791 full_fname(thisname));
792 } else
793 #endif
794 {
795 enum logcode c = am_daemon && protocol_version < 28
796 ? FERROR : FINFO;
797 io_error |= IOERR_VANISHED;
798 rprintf(c, "file has vanished: %s\n",
799 full_fname(thisname));
800 }
801 } else {
802 io_error |= IOERR_GENERAL;
803 rsyserr(FERROR, save_errno, "readlink %s failed",
804 full_fname(thisname));
805 }
806 return NULL;
807 }
808
809 /* backup.c calls us with filter_level set to NO_FILTERS. */
810 if (filter_level == NO_FILTERS)
811 goto skip_filters;
812
813 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
814 rprintf(FINFO, "skipping directory %s\n", safe_fname(thisname));
815 return NULL;
816 }
817
818 /* We only care about directories because we need to avoid recursing
819 * into a mount-point directory, not to avoid copying a symlinked
820 * file if -L (or similar) was specified. */
821 if (one_file_system && st.st_dev != filesystem_dev
822 && S_ISDIR(st.st_mode))
823 flags |= FLAG_MOUNT_POINT;
824
825 if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level))
826 return NULL;
827
828 if (lp_ignore_nonreadable(module_id)) {
829 #ifdef SUPPORT_LINKS
830 if (!S_ISLNK(st.st_mode))
831 #endif
832 if (access(thisname, R_OK) != 0)
833 return NULL;
834 }
835
836 skip_filters:
837
838 if (verbose > 2) {
839 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
840 who_am_i(), safe_fname(thisname), filter_level);
841 }
842
843 if ((basename = strrchr(thisname, '/')) != NULL) {
844 dirname_len = ++basename - thisname; /* counts future '\0' */
845 if (lastdir_len == dirname_len - 1
846 && strncmp(thisname, lastdir, lastdir_len) == 0) {
847 dirname = lastdir;
848 dirname_len = 0; /* indicates no copy is needed */
849 } else
850 dirname = thisname;
851 } else {
852 basename = thisname;
853 dirname = NULL;
854 dirname_len = 0;
855 }
856 basename_len = strlen(basename) + 1; /* count the '\0' */
857
858 #ifdef SUPPORT_LINKS
859 linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
860 #else
861 linkname_len = 0;
862 #endif
863
864 sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
865
866 alloc_len = file_struct_len + dirname_len + basename_len
867 + linkname_len + sum_len;
868 if (flist) {
869 bp = pool_alloc(flist->file_pool, alloc_len,
870 "receive_file_entry");
871 } else {
872 if (!(bp = new_array(char, alloc_len)))
873 out_of_memory("receive_file_entry");
874 }
875
876 file = (struct file_struct *)bp;
877 memset(bp, 0, file_struct_len);
878 bp += file_struct_len;
879
880 file->flags = flags;
881 file->modtime = st.st_mtime;
882 file->length = st.st_size;
883 file->mode = st.st_mode;
884 file->uid = st.st_uid;
885 file->gid = st.st_gid;
886
887 #ifdef SUPPORT_HARD_LINKS
888 if (flist && flist->hlink_pool) {
889 if (protocol_version < 28) {
890 if (S_ISREG(st.st_mode))
891 file->link_u.idev = pool_talloc(
892 flist->hlink_pool, struct idev, 1,
893 "inode_table");
894 } else {
895 if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
896 file->link_u.idev = pool_talloc(
897 flist->hlink_pool, struct idev, 1,
898 "inode_table");
899 }
900 }
901 if (file->link_u.idev) {
902 file->F_DEV = st.st_dev;
903 file->F_INODE = st.st_ino;
904 }
905 #endif
906
907 if (dirname_len) {
908 file->dirname = lastdir = bp;
909 lastdir_len = dirname_len - 1;
910 memcpy(bp, dirname, dirname_len - 1);
911 bp += dirname_len;
912 bp[-1] = '\0';
913 } else if (dirname)
914 file->dirname = dirname;
915
916 file->basename = bp;
917 memcpy(bp, basename, basename_len);
918 bp += basename_len;
919
920 #ifdef HAVE_STRUCT_STAT_ST_RDEV
921 if (preserve_devices && IS_DEVICE(st.st_mode))
922 file->u.rdev = st.st_rdev;
923 #endif
924
925 #ifdef SUPPORT_LINKS
926 if (linkname_len) {
927 file->u.link = bp;
928 memcpy(bp, linkname, linkname_len);
929 bp += linkname_len;
930 }
931 #endif
932
933 if (sum_len) {
934 file->u.sum = bp;
935 file_checksum(thisname, bp, st.st_size);
936 /*bp += sum_len;*/
937 }
938
939 file->dir.root = flist_dir;
940
941 /* This code is only used by the receiver when it is building
942 * a list of files for a delete pass. */
943 if (keep_dirlinks && linkname_len && flist) {
944 STRUCT_STAT st2;
945 int save_mode = file->mode;
946 file->mode = S_IFDIR; /* find a directory w/our name */
947 if (flist_find(the_file_list, file) >= 0
948 && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
949 file->modtime = st2.st_mtime;
950 file->length = st2.st_size;
951 file->mode = st2.st_mode;
952 file->uid = st2.st_uid;
953 file->gid = st2.st_gid;
954 file->u.link = NULL;
955 } else
956 file->mode = save_mode;
957 }
958
959 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
960 stats.total_size += st.st_size;
961
962 return file;
963 }
964
965
966 static struct file_struct *send_file_name(int f, struct file_list *flist,
967 char *fname, unsigned short base_flags)
968 {
969 struct file_struct *file;
970
971 file = make_file(fname, flist, f == -2 ? SERVER_FILTERS : ALL_FILTERS);
972 if (!file)
973 return NULL;
974
975 maybe_emit_filelist_progress(flist->count + flist_count_offset);
976
977 flist_expand(flist);
978
979 if (file->basename[0]) {
980 flist->files[flist->count++] = file;
981 send_file_entry(file, f, base_flags);
982 }
983 return file;
984 }
985
986 static void send_if_directory(int f, struct file_list *flist,
987 struct file_struct *file)
988 {
989 char fbuf[MAXPATHLEN];
990
991 if (S_ISDIR(file->mode)
992 && !(file->flags & FLAG_MOUNT_POINT) && f_name_to(file, fbuf)) {
993 void *save_filters;
994 unsigned int len = strlen(fbuf);
995 if (len > 1 && fbuf[len-1] == '/')
996 fbuf[--len] = '\0';
997 if (len >= MAXPATHLEN - 1) {
998 io_error |= IOERR_GENERAL;
999 rprintf(FERROR, "skipping long-named directory: %s\n",
1000 full_fname(fbuf));
1001 return;
1002 }
1003 save_filters = push_local_filters(fbuf, len);
1004 send_directory(f, flist, fbuf, len);
1005 pop_local_filters(save_filters);
1006 }
1007 }
1008
1009
1010 /* This function is normally called by the sender, but the receiving side also
1011 * calls it from get_dirlist() with f set to -1 so that we just construct the
1012 * file list in memory without sending it over the wire. Also, get_dirlist()
1013 * might call this with f set to -2, which also indicates that local filter
1014 * rules should be ignored. */
1015 static void send_directory(int f, struct file_list *flist,
1016 char *fbuf, int len)
1017 {
1018 struct dirent *di;
1019 unsigned remainder;
1020 char *p;
1021 DIR *d;
1022 int start = flist->count;
1023
1024 if (!(d = opendir(fbuf))) {
1025 io_error |= IOERR_GENERAL;
1026 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1027 return;
1028 }
1029
1030 p = fbuf + len;
1031 if (len != 1 || *fbuf != '/')
1032 *p++ = '/';
1033 *p = '\0';
1034 remainder = MAXPATHLEN - (p - fbuf);
1035
1036 for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1037 char *dname = d_name(di);
1038 if (dname[0] == '.' && (dname[1] == '\0'
1039 || (dname[1] == '.' && dname[2] == '\0')))
1040 continue;
1041 if (strlcpy(p, dname, remainder) < remainder)
1042 send_file_name(f, flist, fbuf, 0);
1043 else {
1044 io_error |= IOERR_GENERAL;
1045 rprintf(FINFO,
1046 "cannot send long-named file %s\n",
1047 full_fname(fbuf));
1048 }
1049 }
1050
1051 fbuf[len] = '\0';
1052
1053 if (errno) {
1054 io_error |= IOERR_GENERAL;
1055 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1056 }
1057
1058 closedir(d);
1059
1060 if (recurse) {
1061 int i, end = flist->count - 1;
1062 for (i = start; i <= end; i++)
1063 send_if_directory(f, flist, flist->files[i]);
1064 }
1065 }
1066
1067
1068 struct file_list *send_file_list(int f, int argc, char *argv[])
1069 {
1070 int l;
1071 STRUCT_STAT st;
1072 char *p, *dir, olddir[sizeof curr_dir];
1073 char lastpath[MAXPATHLEN] = "";
1074 struct file_list *flist;
1075 struct timeval start_tv, end_tv;
1076 int64 start_write;
1077 int use_ff_fd = 0;
1078
1079 if (show_filelist_p())
1080 start_filelist_progress("building file list");
1081
1082 start_write = stats.total_written;
1083 gettimeofday(&start_tv, NULL);
1084
1085 flist = flist_new(WITH_HLINK, "send_file_list");
1086
1087 io_start_buffering_out();
1088 if (filesfrom_fd >= 0) {
1089 if (argv[0] && !push_dir(argv[0])) {
1090 rsyserr(FERROR, errno, "push_dir %s failed",
1091 full_fname(argv[0]));
1092 exit_cleanup(RERR_FILESELECT);
1093 }
1094 use_ff_fd = 1;
1095 }
1096
1097 while (1) {
1098 struct file_struct *file;
1099 char fname2[MAXPATHLEN];
1100 char *fname = fname2;
1101 int is_dot_dir;
1102
1103 if (use_ff_fd) {
1104 if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1105 break;
1106 sanitize_path(fname, fname, "", 0);
1107 } else {
1108 if (argc-- == 0)
1109 break;
1110 strlcpy(fname, *argv++, MAXPATHLEN);
1111 if (sanitize_paths)
1112 sanitize_path(fname, fname, "", 0);
1113 }
1114
1115 l = strlen(fname);
1116 if (!l || fname[l - 1] == '/') {
1117 if (l == 2 && fname[0] == '.') {
1118 /* Turn "./" into just "." rather than "./." */
1119 fname[1] = '\0';
1120 } else if (l < MAXPATHLEN) {
1121 fname[l++] = '.';
1122 fname[l] = '\0';
1123 }
1124 is_dot_dir = 1;
1125 } else {
1126 is_dot_dir = fname[l-1] == '.'
1127 && (l == 1 || fname[l-2] == '/');
1128 }
1129
1130 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1131 io_error |= IOERR_GENERAL;
1132 rsyserr(FERROR, errno, "link_stat %s failed",
1133 full_fname(fname));
1134 continue;
1135 }
1136
1137 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1138 rprintf(FINFO, "skipping directory %s\n",
1139 safe_fname(fname));
1140 continue;
1141 }
1142
1143 dir = NULL;
1144 olddir[0] = '\0';
1145
1146 if (!relative_paths) {
1147 p = strrchr(fname, '/');
1148 if (p) {
1149 *p = 0;
1150 if (p == fname)
1151 dir = "/";
1152 else
1153 dir = fname;
1154 fname = p + 1;
1155 }
1156 } else if (implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1157 /* this ensures we send the intermediate directories,
1158 thus getting their permissions right */
1159 char *lp = lastpath, *fn = fname, *slash = fname;
1160 *p = 0;
1161 /* Skip any initial directories in our path that we
1162 * have in common with lastpath. */
1163 while (*fn && *lp == *fn) {
1164 if (*fn == '/')
1165 slash = fn;
1166 lp++, fn++;
1167 }
1168 *p = '/';
1169 if (fn != p || (*lp && *lp != '/')) {
1170 int save_copy_links = copy_links;
1171 int save_xfer_dirs = xfer_dirs;
1172 copy_links = copy_unsafe_links;
1173 xfer_dirs = 1;
1174 while ((slash = strchr(slash+1, '/')) != 0) {
1175 *slash = 0;
1176 send_file_name(f, flist, fname, 0);
1177 *slash = '/';
1178 }
1179 copy_links = save_copy_links;
1180 xfer_dirs = save_xfer_dirs;
1181 *p = 0;
1182 strlcpy(lastpath, fname, sizeof lastpath);
1183 *p = '/';
1184 }
1185 }
1186
1187 if (!*fname)
1188 fname = ".";
1189
1190 if (dir && *dir) {
1191 static char *lastdir;
1192 static int lastdir_len;
1193
1194 strcpy(olddir, curr_dir); /* can't overflow */
1195
1196 if (!push_dir(dir)) {
1197 io_error |= IOERR_GENERAL;
1198 rsyserr(FERROR, errno, "push_dir %s failed",
1199 full_fname(dir));
1200 continue;
1201 }
1202
1203 if (lastdir && strcmp(lastdir, dir) == 0) {
1204 flist_dir = lastdir;
1205 flist_dir_len = lastdir_len;
1206 } else {
1207 flist_dir = lastdir = strdup(dir);
1208 flist_dir_len = lastdir_len = strlen(dir);
1209 }
1210 }
1211
1212 if (one_file_system)
1213 filesystem_dev = st.st_dev;
1214
1215 if ((file = send_file_name(f, flist, fname, XMIT_TOP_DIR))) {
1216 if (recurse || (xfer_dirs && is_dot_dir))
1217 send_if_directory(f, flist, file);
1218 }
1219
1220 if (olddir[0]) {
1221 flist_dir = NULL;
1222 flist_dir_len = 0;
1223 if (!pop_dir(olddir)) {
1224 rsyserr(FERROR, errno, "pop_dir %s failed",
1225 full_fname(dir));
1226 exit_cleanup(RERR_FILESELECT);
1227 }
1228 }
1229 }
1230
1231 gettimeofday(&end_tv, NULL);
1232 stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1233 + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1234 if (stats.flist_buildtime == 0)
1235 stats.flist_buildtime = 1;
1236 start_tv = end_tv;
1237
1238 send_file_entry(NULL, f, 0);
1239
1240 if (show_filelist_p())
1241 finish_filelist_progress(flist);
1242
1243 gettimeofday(&end_tv, NULL);
1244 stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1245 + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1246
1247 if (flist->hlink_pool) {
1248 pool_destroy(flist->hlink_pool);
1249 flist->hlink_pool = NULL;
1250 }
1251
1252 /* Sort the list without removing any duplicates. This allows the
1253 * receiving side to ask for any name they like, which gives us the
1254 * flexibility to change the way we unduplicate names in the future
1255 * without causing a compatibility problem with older versions. */
1256 clean_flist(flist, 0, 0);
1257
1258 /* Now send the uid/gid list. This was introduced in
1259 * protocol version 15 */
1260 send_uid_list(f);
1261
1262 /* send the io_error flag */
1263 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1264
1265 io_end_buffering();
1266 stats.flist_size = stats.total_written - start_write;
1267 stats.num_files = flist->count;
1268
1269 if (verbose > 3)
1270 output_flist(flist);
1271
1272 if (verbose > 2)
1273 rprintf(FINFO, "send_file_list done\n");
1274
1275 return flist;
1276 }
1277
1278
1279 struct file_list *recv_file_list(int f)
1280 {
1281 struct file_list *flist;
1282 unsigned short flags;
1283 int64 start_read;
1284
1285 if (show_filelist_p())
1286 start_filelist_progress("receiving file list");
1287
1288 start_read = stats.total_read;
1289
1290 flist = flist_new(WITH_HLINK, "recv_file_list");
1291
1292 flist->count = 0;
1293 flist->malloced = 1000;
1294 flist->files = new_array(struct file_struct *, flist->malloced);
1295 if (!flist->files)
1296 goto oom;
1297
1298
1299 while ((flags = read_byte(f)) != 0) {
1300 struct file_struct *file;
1301
1302 flist_expand(flist);
1303
1304 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1305 flags |= read_byte(f) << 8;
1306 file = receive_file_entry(flist, flags, f);
1307
1308 if (S_ISREG(file->mode))
1309 stats.total_size += file->length;
1310
1311 flist->files[flist->count++] = file;
1312
1313 maybe_emit_filelist_progress(flist->count);
1314
1315 if (verbose > 2) {
1316 rprintf(FINFO, "recv_file_name(%s)\n",
1317 safe_fname(f_name(file)));
1318 }
1319 }
1320 receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1321
1322 if (verbose > 2)
1323 rprintf(FINFO, "received %d names\n", flist->count);
1324
1325 if (show_filelist_p())
1326 finish_filelist_progress(flist);
1327
1328 clean_flist(flist, relative_paths, 1);
1329
1330 if (f >= 0) {
1331 /* Now send the uid/gid list. This was introduced in
1332 * protocol version 15 */
1333 recv_uid_list(f, flist);
1334
1335 /* Recv the io_error flag */
1336 if (lp_ignore_errors(module_id) || ignore_errors)
1337 read_int(f);
1338 else
1339 io_error |= read_int(f);
1340 }
1341
1342 if (verbose > 3)
1343 output_flist(flist);
1344
1345 if (list_only) {
1346 int i;
1347 for (i = 0; i < flist->count; i++)
1348 list_file_entry(flist->files[i]);
1349 }
1350
1351 if (verbose > 2)
1352 rprintf(FINFO, "recv_file_list done\n");
1353
1354 stats.flist_size = stats.total_read - start_read;
1355 stats.num_files = flist->count;
1356
1357 return flist;
1358
1359 oom:
1360 out_of_memory("recv_file_list");
1361 return NULL; /* not reached */
1362 }
1363
1364
1365 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1366 {
1367 return f_name_cmp(*file1, *file2);
1368 }
1369
1370
1371 /* Search for an identically-named item in the file list. Note that the
1372 * items must agree in their directory-ness, or no match is returned. */
1373 int flist_find(struct file_list *flist, struct file_struct *f)
1374 {
1375 int low = flist->low, high = flist->high;
1376 int ret, mid, mid_up;
1377
1378 while (low <= high) {
1379 mid = (low + high) / 2;
1380 for (mid_up = mid; !flist->files[mid_up]->basename; mid_up++) {}
1381 if (mid_up <= high)
1382 ret = f_name_cmp(flist->files[mid_up], f);
1383 else
1384 ret = 1;
1385 if (ret == 0) {
1386 if (protocol_version < 29
1387 && S_ISDIR(flist->files[mid_up]->mode)
1388 != S_ISDIR(f->mode))
1389 return -1;
1390 return mid_up;
1391 }
1392 if (ret > 0)
1393 high = mid - 1;
1394 else
1395 low = mid_up + 1;
1396 }
1397 return -1;
1398 }
1399
1400
1401 /*
1402 * Free up any resources a file_struct has allocated
1403 * and clear the file.
1404 */
1405 void clear_file(int i, struct file_list *flist)
1406 {
1407 if (flist->hlink_pool && flist->files[i]->link_u.idev)
1408 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1409 memset(flist->files[i], 0, file_struct_len);
1410 }
1411
1412
1413 /*
1414 * allocate a new file list
1415 */
1416 struct file_list *flist_new(int with_hlink, char *msg)
1417 {
1418 struct file_list *flist;
1419
1420 flist = new(struct file_list);
1421 if (!flist)
1422 out_of_memory(msg);
1423
1424 memset(flist, 0, sizeof (struct file_list));
1425
1426 if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1427 out_of_memory, POOL_INTERN)))
1428 out_of_memory(msg);
1429
1430 #ifdef SUPPORT_HARD_LINKS
1431 if (with_hlink && preserve_hard_links) {
1432 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1433 sizeof (struct idev), out_of_memory, POOL_INTERN)))
1434 out_of_memory(msg);
1435 }
1436 #endif
1437
1438 return flist;
1439 }
1440
1441 /*
1442 * free up all elements in a flist
1443 */
1444 void flist_free(struct file_list *flist)
1445 {
1446 pool_destroy(flist->file_pool);
1447 pool_destroy(flist->hlink_pool);
1448 free(flist->files);
1449 free(flist);
1450 }
1451
1452
1453 /*
1454 * This routine ensures we don't have any duplicate names in our file list.
1455 * duplicate names can cause corruption because of the pipelining
1456 */
1457 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1458 {
1459 int i, prev_i = 0;
1460
1461 if (!flist || flist->count == 0)
1462 return;
1463
1464 sorting_flist = flist;
1465 qsort(flist->files, flist->count,
1466 sizeof flist->files[0], (int (*)())file_compare);
1467 sorting_flist = NULL;
1468
1469 for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1470 if (flist->files[i]->basename) {
1471 prev_i = i;
1472 break;
1473 }
1474 }
1475 flist->low = prev_i;
1476 while (++i < flist->count) {
1477 int j;
1478 struct file_struct *file = flist->files[i];
1479
1480 if (!file->basename)
1481 continue;
1482 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1483 j = prev_i;
1484 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1485 int save_mode = file->mode;
1486 /* Make sure that this directory doesn't duplicate a
1487 * non-directory earlier in the list. */
1488 flist->high = prev_i;
1489 file->mode = S_IFREG;
1490 j = flist_find(flist, file);
1491 file->mode = save_mode;
1492 } else
1493 j = -1;
1494 if (j >= 0) {
1495 struct file_struct *fp = flist->files[j];
1496 int keep, drop;
1497 /* If one is a dir and the other is not, we want to
1498 * keep the dir because it might have contents in the
1499 * list. */
1500 if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1501 if (S_ISDIR(file->mode))
1502 keep = i, drop = j;
1503 else
1504 keep = j, drop = i;
1505 } else
1506 keep = j, drop = i;
1507 if (verbose > 1 && !am_server) {
1508 rprintf(FINFO,
1509 "removing duplicate name %s from file list (%d)\n",
1510 safe_fname(f_name(file)), drop);
1511 }
1512 /* Make sure that if we unduplicate '.', that we don't
1513 * lose track of a user-specified top directory. */
1514 if (flist->files[drop]->flags & FLAG_TOP_DIR)
1515 flist->files[keep]->flags |= FLAG_TOP_DIR;
1516
1517 clear_file(drop, flist);
1518
1519 if (keep == i) {
1520 if (flist->low == drop) {
1521 for (j = drop + 1;
1522 j < i && !flist->files[j]->basename;
1523 j++) {}
1524 flist->low = j;
1525 }
1526 prev_i = i;
1527 }
1528 } else
1529 prev_i = i;
1530 }
1531 flist->high = no_dups ? prev_i : flist->count - 1;
1532
1533 if (strip_root) {
1534 /* We need to strip off the leading slashes for relative
1535 * paths, but this must be done _after_ the sorting phase. */
1536 for (i = flist->low; i <= flist->high; i++) {
1537 struct file_struct *file = flist->files[i];
1538
1539 if (!file->dirname)
1540 continue;
1541 if (*file->dirname == '/') {
1542 char *s = file->dirname + 1;
1543 while (*s == '/') s++;
1544 memmove(file->dirname, s, strlen(s) + 1);
1545 }
1546
1547 if (!*file->dirname)
1548 file->dirname = NULL;
1549 }
1550 }
1551 }
1552
1553
1554 static void output_flist(struct file_list *flist)
1555 {
1556 char uidbuf[16], gidbuf[16], depthbuf[16];
1557 struct file_struct *file;
1558 const char *who = who_am_i();
1559 int i;
1560
1561 for (i = 0; i < flist->count; i++) {
1562 file = flist->files[i];
1563 if ((am_root || am_sender) && preserve_uid)
1564 sprintf(uidbuf, " uid=%ld", (long)file->uid);
1565 else
1566 *uidbuf = '\0';
1567 if (preserve_gid && file->gid != GID_NONE)
1568 sprintf(gidbuf, " gid=%ld", (long)file->gid);
1569 else
1570 *gidbuf = '\0';
1571 if (!am_sender)
1572 sprintf(depthbuf, "%d", file->dir.depth);
1573 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
1574 who, i, am_sender ? NS(file->dir.root) : depthbuf,
1575 file->dirname ? safe_fname(file->dirname) : "",
1576 file->dirname ? "/" : "", NS(file->basename),
1577 S_ISDIR(file->mode) ? "/" : "", (int)file->mode,
1578 (double)file->length, uidbuf, gidbuf, file->flags);
1579 }
1580 }
1581
1582
1583 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
1584 enum fnc_type { t_PATH, t_ITEM };
1585
1586 /* Compare the names of two file_struct entities, similar to how strcmp()
1587 * would do if it were operating on the joined strings.
1588 *
1589 * Some differences beginning with protocol_version 29: (1) directory names
1590 * are compared with an assumed trailing slash so that they compare in a
1591 * way that would cause them to sort immediately prior to any content they
1592 * may have; (2) a directory of any name compares after a non-directory of
1593 * any name at the same depth; (3) a directory with name "." compares prior
1594 * to anything else. These changes mean that a directory and a non-dir
1595 * with the same name will not compare as equal (protocol_version >= 29).
1596 *
1597 * The dirname component can be an empty string, but the basename component
1598 * cannot (and never is in the current codebase). The basename component
1599 * may be NULL (for a removed item), in which case it is considered to be
1600 * after any existing item. */
1601 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1602 {
1603 int dif;
1604 const uchar *c1, *c2;
1605 enum fnc_state state1, state2;
1606 enum fnc_type type1, type2;
1607 enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
1608
1609 if (!f1 || !f1->basename) {
1610 if (!f2 || !f2->basename)
1611 return 0;
1612 return -1;
1613 }
1614 if (!f2 || !f2->basename)
1615 return 1;
1616
1617 c1 = (uchar*)f1->dirname;
1618 c2 = (uchar*)f2->dirname;
1619 if (c1 == c2)
1620 c1 = c2 = NULL;
1621 if (!c1) {
1622 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1623 c1 = (uchar*)f1->basename;
1624 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1625 type1 = t_ITEM;
1626 state1 = s_TRAILING;
1627 c1 = (uchar*)"";
1628 } else
1629 state1 = s_BASE;
1630 } else if (!*c1) {
1631 type1 = t_path;
1632 state1 = s_SLASH;
1633 c1 = (uchar*)"/";
1634 } else {
1635 type1 = t_path;
1636 state1 = s_DIR;
1637 }
1638 if (!c2) {
1639 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1640 c2 = (uchar*)f2->basename;
1641 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1642 type2 = t_ITEM;
1643 state2 = s_TRAILING;
1644 c2 = (uchar*)"";
1645 } else
1646 state2 = s_BASE;
1647 } else if (!*c2) {
1648 type2 = t_path;
1649 state2 = s_SLASH;
1650 c2 = (uchar*)"/";
1651 } else {
1652 type2 = t_path;
1653 state2 = s_DIR;
1654 }
1655
1656 if (type1 != type2)
1657 return type1 == t_PATH ? 1 : -1;
1658
1659 while (1) {
1660 if ((dif = (int)*c1++ - (int)*c2++) != 0)
1661 break;
1662 if (!*c1) {
1663 switch (state1) {
1664 case s_DIR:
1665 state1 = s_SLASH;
1666 c1 = (uchar*)"/";
1667 break;
1668 case s_SLASH:
1669 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1670 state1 = s_BASE;
1671 c1 = (uchar*)f1->basename;
1672 break;
1673 case s_BASE:
1674 state1 = s_TRAILING;
1675 if (type1 == t_PATH) {
1676 c1 = (uchar*)"/";
1677 break;
1678 }
1679 /* FALL THROUGH */
1680 case s_TRAILING:
1681 type1 = t_ITEM;
1682 break;
1683 }
1684 if (*c2 && type1 != type2)
1685 return type1 == t_PATH ? 1 : -1;
1686 }
1687 if (!*c2) {
1688 switch (state2) {
1689 case s_DIR:
1690 state2 = s_SLASH;
1691 c2 = (uchar*)"/";
1692 break;
1693 case s_SLASH:
1694 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1695 state2 = s_BASE;
1696 c2 = (uchar*)f2->basename;
1697 break;
1698 case s_BASE:
1699 state2 = s_TRAILING;
1700 if (type2 == t_PATH) {
1701 c2 = (uchar*)"/";
1702 break;
1703 }
1704 /* FALL THROUGH */
1705 case s_TRAILING:
1706 if (!*c1)
1707 return 0;
1708 type2 = t_ITEM;
1709 break;
1710 }
1711 if (type1 != type2)
1712 return type1 == t_PATH ? 1 : -1;
1713 }
1714 }
1715
1716 return dif;
1717 }
1718
1719
1720 /* Return a copy of the full filename of a flist entry, using the indicated
1721 * buffer. No size-checking is done because we checked the size when creating
1722 * the file_struct entry.
1723 */
1724 char *f_name_to(struct file_struct *f, char *fbuf)
1725 {
1726 if (!f || !f->basename)
1727 return NULL;
1728
1729 if (f->dirname) {
1730 int len = strlen(f->dirname);
1731 memcpy(fbuf, f->dirname, len);
1732 fbuf[len] = '/';
1733 strcpy(fbuf + len + 1, f->basename);
1734 } else
1735 strcpy(fbuf, f->basename);
1736 return fbuf;
1737 }
1738
1739
1740 /* Like f_name_to(), but we rotate through 5 static buffers of our own. */
1741 char *f_name(struct file_struct *f)
1742 {
1743 static char names[5][MAXPATHLEN];
1744 static unsigned int n;
1745
1746 n = (n + 1) % (sizeof names / sizeof names[0]);
1747
1748 return f_name_to(f, names[n]);
1749 }
1750
1751
1752 /* Do a non-recursive scan of the named directory, possibly ignoring all
1753 * exclude rules except for the daemon's. If "dlen" is >=0, it is the length
1754 * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
1755 * buffer (the functions we call will append names onto the end, but the old
1756 * dir value will be restored on exit). */
1757 struct file_list *get_dirlist(char *dirname, int dlen,
1758 int ignore_filter_rules)
1759 {
1760 struct file_list *dirlist;
1761 char dirbuf[MAXPATHLEN];
1762 int save_recurse = recurse;
1763
1764 if (dlen < 0) {
1765 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
1766 if (dlen >= MAXPATHLEN)
1767 return NULL;
1768 dirname = dirbuf;
1769 }
1770
1771 dirlist = flist_new(WITHOUT_HLINK, "get_dirlist");
1772
1773 recurse = 0;
1774 send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen);
1775 recurse = save_recurse;
1776 if (do_progress)
1777 flist_count_offset += dirlist->count;
1778
1779 clean_flist(dirlist, 0, 0);
1780
1781 if (verbose > 3)
1782 output_flist(dirlist);
1783
1784 return dirlist;
1785 }
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