Fixed crash bug that can affect --delete in certain circumstances.
[rsync.git] / flist.c
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 struct stats stats;
31
32 extern int verbose;
33 extern int do_progress;
34 extern int am_root;
35 extern int am_server;
36 extern int am_daemon;
37 extern int always_checksum;
38 extern int module_id;
39 extern int ignore_errors;
40 extern int numeric_ids;
41
42 extern int cvs_exclude;
43
44 extern int recurse;
45 extern char curr_dir[MAXPATHLEN];
46 extern char *files_from;
47 extern int filesfrom_fd;
48
49 extern int one_file_system;
50 extern int preserve_links;
51 extern int preserve_hard_links;
52 extern int preserve_perms;
53 extern int preserve_devices;
54 extern int preserve_uid;
55 extern int preserve_gid;
56 extern int preserve_times;
57 extern int relative_paths;
58 extern int implied_dirs;
59 extern int copy_links;
60 extern int copy_unsafe_links;
61 extern int protocol_version;
62 extern int sanitize_paths;
63
64 extern int read_batch;
65 extern int write_batch;
66
67 extern struct exclude_list_struct exclude_list;
68 extern struct exclude_list_struct server_exclude_list;
69 extern struct exclude_list_struct local_exclude_list;
70
71 int io_error;
72
73 static char empty_sum[MD4_SUM_LENGTH];
74 static unsigned int file_struct_len;
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 && (recurse || files_from) && !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(const struct file_list *flist)
103 {
104         rprintf(FINFO, " %d files...\r", flist->count);
105 }
106
107
108 static void maybe_emit_filelist_progress(const struct file_list *flist)
109 {
110         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
111                 emit_filelist_progress(flist);
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         permstring(perms, f->mode);
140
141 #if SUPPORT_LINKS
142         if (preserve_links && S_ISLNK(f->mode)) {
143                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
144                         perms,
145                         (double) f->length, timestring(f->modtime),
146                         f_name(f), f->u.link);
147         } else
148 #endif
149                 rprintf(FINFO, "%s %11.0f %s %s\n",
150                         perms,
151                         (double) f->length, timestring(f->modtime),
152                         f_name(f));
153 }
154
155
156 /**
157  * Stat either a symlink or its referent, depending on the settings of
158  * copy_links, copy_unsafe_links, etc.
159  *
160  * @retval -1 on error
161  *
162  * @retval 0 for success
163  *
164  * @post If @p path is a symlink, then @p linkbuf (of size @c
165  * MAXPATHLEN) contains the symlink target.
166  *
167  * @post @p buffer contains information about the link or the
168  * referrent as appropriate, if they exist.
169  **/
170 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
171 {
172 #if SUPPORT_LINKS
173         if (copy_links)
174                 return do_stat(path, buffer);
175         if (do_lstat(path, buffer) == -1)
176                 return -1;
177         if (S_ISLNK(buffer->st_mode)) {
178                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
179                 if (l == -1)
180                         return -1;
181                 linkbuf[l] = 0;
182                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
183                         if (verbose > 1) {
184                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
185                                         path, linkbuf);
186                         }
187                         return do_stat(path, buffer);
188                 }
189         }
190         return 0;
191 #else
192         return do_stat(path, buffer);
193 #endif
194 }
195
196 int link_stat(const char *path, STRUCT_STAT * buffer)
197 {
198 #if SUPPORT_LINKS
199         if (copy_links)
200                 return do_stat(path, buffer);
201         return do_lstat(path, buffer);
202 #else
203         return do_stat(path, buffer);
204 #endif
205 }
206
207 /*
208  * This function is used to check if a file should be included/excluded
209  * from the list of files based on its name and type etc.  The value of
210  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
211  */
212 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
213 {
214         int rc;
215
216 #if 0 /* This currently never happens, so avoid a useless compare. */
217         if (exclude_level == NO_EXCLUDES)
218                 return 0;
219 #endif
220         if (fname) {
221                 /* never exclude '.', even if somebody does --exclude '*' */
222                 if (fname[0] == '.' && !fname[1])
223                         return 0;
224                 /* Handle the -R version of the '.' dir. */
225                 if (fname[0] == '/') {
226                         int len = strlen(fname);
227                         if (fname[len-1] == '.' && fname[len-2] == '/')
228                                 return 0;
229                 }
230         }
231         if (server_exclude_list.head
232             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
233                 return 1;
234         if (exclude_level != ALL_EXCLUDES)
235                 return 0;
236         if (exclude_list.head
237             && (rc = check_exclude(&exclude_list, fname, is_dir)) != 0)
238                 return rc < 0;
239         if (local_exclude_list.head
240             && check_exclude(&local_exclude_list, fname, is_dir) < 0)
241                 return 1;
242         return 0;
243 }
244
245 /* used by the one_file_system code */
246 static dev_t filesystem_dev;
247
248 static void set_filesystem(char *fname)
249 {
250         STRUCT_STAT st;
251         if (link_stat(fname, &st) != 0)
252                 return;
253         filesystem_dev = st.st_dev;
254 }
255
256
257 static int to_wire_mode(mode_t mode)
258 {
259 #if SUPPORT_LINKS
260         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
261                 return (mode & ~(_S_IFMT)) | 0120000;
262 #endif
263         return (int) mode;
264 }
265
266 static mode_t from_wire_mode(int mode)
267 {
268         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
269                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
270         return (mode_t) mode;
271 }
272
273
274 static void send_directory(int f, struct file_list *flist, char *dir);
275
276 static char *flist_dir;
277 static int flist_dir_len;
278
279
280 /**
281  * Make sure @p flist is big enough to hold at least @p flist->count
282  * entries.
283  **/
284 void flist_expand(struct file_list *flist)
285 {
286         void *new_ptr;
287
288         if (flist->count < flist->malloced)
289                 return;
290
291         if (flist->malloced < FLIST_START)
292                 flist->malloced = FLIST_START;
293         else if (flist->malloced >= FLIST_LINEAR)
294                 flist->malloced += FLIST_LINEAR;
295         else
296                 flist->malloced *= 2;
297
298         /*
299          * In case count jumped or we are starting the list
300          * with a known size just set it.
301          */
302         if (flist->malloced < flist->count)
303                 flist->malloced = flist->count;
304
305         if (flist->files) {
306                 new_ptr = realloc_array(flist->files,
307                     struct file_struct *, flist->malloced);
308         } else {
309                 new_ptr = new_array(struct file_struct *, flist->malloced);
310         }
311
312         if (verbose >= 2) {
313                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
314                     who_am_i(),
315                     (double) sizeof flist->files[0] * flist->malloced,
316                     (new_ptr == flist->files) ? " not" : "");
317         }
318
319         flist->files = (struct file_struct **) new_ptr;
320
321         if (!flist->files)
322                 out_of_memory("flist_expand");
323 }
324
325 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
326 {
327         unsigned short flags;
328         static time_t modtime;
329         static mode_t mode;
330         static uint64 dev;
331         static dev_t rdev;
332         static uint32 rdev_major;
333         static uid_t uid;
334         static gid_t gid;
335         static char lastname[MAXPATHLEN];
336         char *fname, fbuf[MAXPATHLEN];
337         int l1, l2;
338
339         if (f == -1)
340                 return;
341
342         if (!file) {
343                 write_byte(f, 0);
344                 modtime = 0, mode = 0;
345                 dev = 0, rdev = makedev(0, 0);
346                 rdev_major = 0;
347                 uid = 0, gid = 0;
348                 *lastname = '\0';
349                 return;
350         }
351
352         io_write_phase = "send_file_entry";
353
354         fname = f_name_to(file, fbuf);
355
356         flags = base_flags;
357
358         if (file->mode == mode)
359                 flags |= XMIT_SAME_MODE;
360         else
361                 mode = file->mode;
362         if (preserve_devices) {
363                 if (protocol_version < 28) {
364                         if (IS_DEVICE(mode)) {
365                                 if (file->u.rdev == rdev)
366                                         flags |= XMIT_SAME_RDEV_pre28;
367                                 else
368                                         rdev = file->u.rdev;
369                         } else
370                                 rdev = makedev(0, 0);
371                 } else if (IS_DEVICE(mode)) {
372                         rdev = file->u.rdev;
373                         if ((uint32)major(rdev) == rdev_major)
374                                 flags |= XMIT_SAME_RDEV_MAJOR;
375                         else
376                                 rdev_major = major(rdev);
377                         if ((uint32)minor(rdev) <= 0xFFu)
378                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
379                 }
380         }
381         if (file->uid == uid)
382                 flags |= XMIT_SAME_UID;
383         else
384                 uid = file->uid;
385         if (file->gid == gid)
386                 flags |= XMIT_SAME_GID;
387         else
388                 gid = file->gid;
389         if (file->modtime == modtime)
390                 flags |= XMIT_SAME_TIME;
391         else
392                 modtime = file->modtime;
393
394 #if SUPPORT_HARD_LINKS
395         if (file->link_u.idev) {
396                 if (file->F_DEV == dev) {
397                         if (protocol_version >= 28)
398                                 flags |= XMIT_SAME_DEV;
399                 } else
400                         dev = file->F_DEV;
401                 flags |= XMIT_HAS_IDEV_DATA;
402         }
403 #endif
404
405         for (l1 = 0;
406             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
407             l1++) {}
408         l2 = strlen(fname+l1);
409
410         if (l1 > 0)
411                 flags |= XMIT_SAME_NAME;
412         if (l2 > 255)
413                 flags |= XMIT_LONG_NAME;
414
415         /* We must make sure we don't send a zero flag byte or the
416          * other end will terminate the flist transfer.  Note that
417          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
418          * it's harmless way to add a bit to the first flag byte. */
419         if (protocol_version >= 28) {
420                 if (!flags && !S_ISDIR(mode))
421                         flags |= XMIT_TOP_DIR;
422                 if ((flags & 0xFF00) || !flags) {
423                         flags |= XMIT_EXTENDED_FLAGS;
424                         write_byte(f, flags);
425                         write_byte(f, flags >> 8);
426                 } else
427                         write_byte(f, flags);
428         } else {
429                 if (!(flags & 0xFF) && !S_ISDIR(mode))
430                         flags |= XMIT_TOP_DIR;
431                 if (!(flags & 0xFF))
432                         flags |= XMIT_LONG_NAME;
433                 write_byte(f, flags);
434         }
435         if (flags & XMIT_SAME_NAME)
436                 write_byte(f, l1);
437         if (flags & XMIT_LONG_NAME)
438                 write_int(f, l2);
439         else
440                 write_byte(f, l2);
441         write_buf(f, fname + l1, l2);
442
443         write_longint(f, file->length);
444         if (!(flags & XMIT_SAME_TIME))
445                 write_int(f, modtime);
446         if (!(flags & XMIT_SAME_MODE))
447                 write_int(f, to_wire_mode(mode));
448         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
449                 if (!numeric_ids)
450                         add_uid(uid);
451                 write_int(f, uid);
452         }
453         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
454                 if (!numeric_ids)
455                         add_gid(gid);
456                 write_int(f, gid);
457         }
458         if (preserve_devices && IS_DEVICE(mode)) {
459                 if (protocol_version < 28) {
460                         if (!(flags & XMIT_SAME_RDEV_pre28))
461                                 write_int(f, (int)rdev);
462                 } else {
463                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
464                                 write_int(f, major(rdev));
465                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
466                                 write_byte(f, minor(rdev));
467                         else
468                                 write_int(f, minor(rdev));
469                 }
470         }
471
472 #if SUPPORT_LINKS
473         if (preserve_links && S_ISLNK(mode)) {
474                 int len = strlen(file->u.link);
475                 write_int(f, len);
476                 write_buf(f, file->u.link, len);
477         }
478 #endif
479
480 #if SUPPORT_HARD_LINKS
481         if (flags & XMIT_HAS_IDEV_DATA) {
482                 if (protocol_version < 26) {
483                         /* 32-bit dev_t and ino_t */
484                         write_int(f, dev);
485                         write_int(f, file->F_INODE);
486                 } else {
487                         /* 64-bit dev_t and ino_t */
488                         if (!(flags & XMIT_SAME_DEV))
489                                 write_longint(f, dev);
490                         write_longint(f, file->F_INODE);
491                 }
492         }
493 #endif
494
495         if (always_checksum) {
496                 char *sum;
497                 if (S_ISREG(mode))
498                         sum = file->u.sum;
499                 else if (protocol_version < 28) {
500                         /* Prior to 28, we sent a useless set of nulls. */
501                         sum = empty_sum;
502                 } else
503                         sum = NULL;
504                 if (sum) {
505                         write_buf(f, sum,
506                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
507                 }
508         }
509
510         strlcpy(lastname, fname, MAXPATHLEN);
511
512         io_write_phase = "unknown";
513 }
514
515
516
517 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
518     struct file_list *flist, int f)
519 {
520         static time_t modtime;
521         static mode_t mode;
522         static uint64 dev;
523         static dev_t rdev;
524         static uint32 rdev_major;
525         static uid_t uid;
526         static gid_t gid;
527         static char lastname[MAXPATHLEN], *lastdir;
528         static int lastdir_len = -1;
529         char thisname[MAXPATHLEN];
530         unsigned int l1 = 0, l2 = 0;
531         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
532         OFF_T file_length;
533         char *basename, *dirname, *bp;
534         struct file_struct *file;
535
536         if (!fptr) {
537                 modtime = 0, mode = 0;
538                 dev = 0, rdev = makedev(0, 0);
539                 rdev_major = 0;
540                 uid = 0, gid = 0;
541                 *lastname = '\0';
542                 return;
543         }
544
545         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
546                 lastdir_len = -1;
547
548         if (flags & XMIT_SAME_NAME)
549                 l1 = read_byte(f);
550
551         if (flags & XMIT_LONG_NAME)
552                 l2 = read_int(f);
553         else
554                 l2 = read_byte(f);
555
556         if (l2 >= MAXPATHLEN - l1) {
557                 rprintf(FERROR,
558                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
559                         flags, l1, l2, lastname);
560                 overflow("receive_file_entry");
561         }
562
563         strlcpy(thisname, lastname, l1 + 1);
564         read_sbuf(f, &thisname[l1], l2);
565         thisname[l1 + l2] = 0;
566
567         strlcpy(lastname, thisname, MAXPATHLEN);
568
569         clean_fname(thisname);
570
571         if (sanitize_paths)
572                 sanitize_path(thisname, NULL);
573
574         if ((basename = strrchr(thisname, '/')) != NULL) {
575                 dirname_len = ++basename - thisname; /* counts future '\0' */
576                 if (lastdir_len == dirname_len - 1
577                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
578                         dirname = lastdir;
579                         dirname_len = 0; /* indicates no copy is needed */
580                 } else
581                         dirname = thisname;
582         } else {
583                 basename = thisname;
584                 dirname = NULL;
585                 dirname_len = 0;
586         }
587         basename_len = strlen(basename) + 1; /* count the '\0' */
588
589         file_length = read_longint(f);
590         if (!(flags & XMIT_SAME_TIME))
591                 modtime = (time_t)read_int(f);
592         if (!(flags & XMIT_SAME_MODE))
593                 mode = from_wire_mode(read_int(f));
594
595         if (preserve_uid && !(flags & XMIT_SAME_UID))
596                 uid = (uid_t)read_int(f);
597         if (preserve_gid && !(flags & XMIT_SAME_GID))
598                 gid = (gid_t)read_int(f);
599
600         if (preserve_devices) {
601                 if (protocol_version < 28) {
602                         if (IS_DEVICE(mode)) {
603                                 if (!(flags & XMIT_SAME_RDEV_pre28))
604                                         rdev = (dev_t)read_int(f);
605                         } else
606                                 rdev = makedev(0, 0);
607                 } else if (IS_DEVICE(mode)) {
608                         uint32 rdev_minor;
609                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
610                                 rdev_major = read_int(f);
611                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
612                                 rdev_minor = read_byte(f);
613                         else
614                                 rdev_minor = read_int(f);
615                         rdev = makedev(rdev_major, rdev_minor);
616                 }
617         }
618
619 #if SUPPORT_LINKS
620         if (preserve_links && S_ISLNK(mode)) {
621                 linkname_len = read_int(f) + 1; /* count the '\0' */
622                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
623                         rprintf(FERROR, "overflow: linkname_len=%d\n",
624                                 linkname_len - 1);
625                         overflow("receive_file_entry");
626                 }
627         }
628         else
629 #endif
630                 linkname_len = 0;
631
632         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
633
634         alloc_len = file_struct_len + dirname_len + basename_len
635                   + linkname_len + sum_len;
636         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
637
638         file = *fptr = (struct file_struct *)bp;
639         memset(bp, 0, file_struct_len);
640         bp += file_struct_len;
641
642         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
643         file->modtime = modtime;
644         file->length = file_length;
645         file->mode = mode;
646         file->uid = uid;
647         file->gid = gid;
648
649         if (dirname_len) {
650                 file->dirname = lastdir = bp;
651                 lastdir_len = dirname_len - 1;
652                 memcpy(bp, dirname, dirname_len - 1);
653                 bp += dirname_len;
654                 bp[-1] = '\0';
655         } else if (dirname)
656                 file->dirname = dirname;
657
658         file->basename = bp;
659         memcpy(bp, basename, basename_len);
660         bp += basename_len;
661
662         if (preserve_devices && IS_DEVICE(mode))
663                 file->u.rdev = rdev;
664
665 #if SUPPORT_LINKS
666         if (linkname_len) {
667                 file->u.link = bp;
668                 read_sbuf(f, bp, linkname_len - 1);
669                 if (sanitize_paths)
670                         sanitize_path(bp, lastdir);
671                 bp += linkname_len;
672         }
673 #endif
674
675 #if SUPPORT_HARD_LINKS
676         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
677                 flags |= XMIT_HAS_IDEV_DATA;
678         if (flags & XMIT_HAS_IDEV_DATA) {
679                 uint64 inode;
680                 if (protocol_version < 26) {
681                         dev = read_int(f);
682                         inode = read_int(f);
683                 } else {
684                         if (!(flags & XMIT_SAME_DEV))
685                                 dev = read_longint(f);
686                         inode = read_longint(f);
687                 }
688                 if (flist->hlink_pool) {
689                         file->link_u.idev = pool_talloc(flist->hlink_pool,
690                             struct idev, 1, "inode_table");
691                         file->F_INODE = inode;
692                         file->F_DEV = dev;
693                 }
694         }
695 #endif
696
697         if (always_checksum) {
698                 char *sum;
699                 if (sum_len) {
700                         file->u.sum = sum = bp;
701                         /*bp += sum_len;*/
702                 } else if (protocol_version < 28) {
703                         /* Prior to 28, we get a useless set of nulls. */
704                         sum = empty_sum;
705                 } else
706                         sum = NULL;
707                 if (sum) {
708                         read_buf(f, sum,
709                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
710                 }
711         }
712
713         if (!preserve_perms) {
714                 extern int orig_umask;
715                 /* set an appropriate set of permissions based on original
716                  * permissions and umask. This emulates what GNU cp does */
717                 file->mode &= ~orig_umask;
718         }
719 }
720
721
722 /**
723  * Create a file_struct for a named file by reading its stat()
724  * information and performing extensive checks against global
725  * options.
726  *
727  * @return the new file, or NULL if there was an error or this file
728  * should be excluded.
729  *
730  * @todo There is a small optimization opportunity here to avoid
731  * stat()ing the file in some circumstances, which has a certain cost.
732  * We are called immediately after doing readdir(), and so we may
733  * already know the d_type of the file.  We could for example avoid
734  * statting directories if we're not recursing, but this is not a very
735  * important case.  Some systems may not have d_type.
736  **/
737 struct file_struct *make_file(char *fname,
738     struct file_list *flist, int exclude_level)
739 {
740         static char *lastdir;
741         static int lastdir_len = -1;
742         struct file_struct *file;
743         STRUCT_STAT st;
744         char sum[SUM_LENGTH];
745         char thisname[MAXPATHLEN];
746         char linkname[MAXPATHLEN];
747         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
748         char *basename, *dirname, *bp;
749         unsigned short flags = 0;
750
751         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
752                 lastdir_len = -1;
753
754         if (strlcpy(thisname, fname, sizeof thisname)
755             >= sizeof thisname - flist_dir_len) {
756                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
757                 return NULL;
758         }
759         clean_fname(thisname);
760         if (sanitize_paths)
761                 sanitize_path(thisname, NULL);
762
763         memset(sum, 0, SUM_LENGTH);
764
765         if (readlink_stat(thisname, &st, linkname) != 0) {
766                 int save_errno = errno;
767                 if (errno == ENOENT) {
768                         enum logcode c = am_daemon && protocol_version < 28
769                             ? FERROR : FINFO;
770                         /* either symlink pointing nowhere or file that
771                          * was removed during rsync run; see if excluded
772                          * before reporting an error */
773                         if (exclude_level != NO_EXCLUDES
774                             && check_exclude_file(thisname, 0, exclude_level)) {
775                                 /* file is excluded anyway, ignore silently */
776                                 return NULL;
777                         }
778                         io_error |= IOERR_VANISHED;
779                         rprintf(c, "file has vanished: %s\n",
780                             full_fname(thisname));
781                 }
782                 else {
783                         io_error |= IOERR_GENERAL;
784                         rprintf(FERROR, "readlink %s failed: %s\n",
785                             full_fname(thisname), strerror(save_errno));
786                 }
787                 return NULL;
788         }
789
790         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
791         if (exclude_level == NO_EXCLUDES)
792                 goto skip_excludes;
793
794         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
795                 rprintf(FINFO, "skipping directory %s\n", thisname);
796                 return NULL;
797         }
798
799         /* We only care about directories because we need to avoid recursing
800          * into a mount-point directory, not to avoid copying a symlinked
801          * file if -L (or similar) was specified. */
802         if (one_file_system && st.st_dev != filesystem_dev
803             && S_ISDIR(st.st_mode))
804                 flags |= FLAG_MOUNT_POINT;
805
806         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
807                 return NULL;
808
809         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
810                 return NULL;
811
812 skip_excludes:
813
814         if (verbose > 2) {
815                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
816                         who_am_i(), thisname, exclude_level);
817         }
818
819         if ((basename = strrchr(thisname, '/')) != NULL) {
820                 dirname_len = ++basename - thisname; /* counts future '\0' */
821                 if (lastdir_len == dirname_len - 1
822                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
823                         dirname = lastdir;
824                         dirname_len = 0; /* indicates no copy is needed */
825                 } else
826                         dirname = thisname;
827         } else {
828                 basename = thisname;
829                 dirname = NULL;
830                 dirname_len = 0;
831         }
832         basename_len = strlen(basename) + 1; /* count the '\0' */
833
834 #if SUPPORT_LINKS
835         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
836 #else
837         linkname_len = 0;
838 #endif
839
840         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
841
842         alloc_len = file_struct_len + dirname_len + basename_len
843             + linkname_len + sum_len;
844         if (flist) {
845                 bp = pool_alloc(flist->file_pool, alloc_len,
846                     "receive_file_entry");
847         } else {
848                 if (!(bp = new_array(char, alloc_len)))
849                         out_of_memory("receive_file_entry");
850         }
851
852         file = (struct file_struct *)bp;
853         memset(bp, 0, file_struct_len);
854         bp += file_struct_len;
855
856         file->flags = flags;
857         file->modtime = st.st_mtime;
858         file->length = st.st_size;
859         file->mode = st.st_mode;
860         file->uid = st.st_uid;
861         file->gid = st.st_gid;
862
863 #if SUPPORT_HARD_LINKS
864         if (flist && flist->hlink_pool) {
865                 if (protocol_version < 28) {
866                         if (S_ISREG(st.st_mode))
867                                 file->link_u.idev = pool_talloc(
868                                     flist->hlink_pool, struct idev, 1,
869                                     "inode_table");
870                 } else {
871                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
872                                 file->link_u.idev = pool_talloc(
873                                     flist->hlink_pool, struct idev, 1,
874                                     "inode_table");
875                 }
876         }
877         if (file->link_u.idev) {
878                 file->F_DEV = st.st_dev;
879                 file->F_INODE = st.st_ino;
880         }
881 #endif
882
883         if (dirname_len) {
884                 file->dirname = lastdir = bp;
885                 lastdir_len = dirname_len - 1;
886                 memcpy(bp, dirname, dirname_len - 1);
887                 bp += dirname_len;
888                 bp[-1] = '\0';
889         } else if (dirname)
890                 file->dirname = dirname;
891
892         file->basename = bp;
893         memcpy(bp, basename, basename_len);
894         bp += basename_len;
895
896 #ifdef HAVE_STRUCT_STAT_ST_RDEV
897         if (preserve_devices && IS_DEVICE(st.st_mode))
898                 file->u.rdev = st.st_rdev;
899 #endif
900
901 #if SUPPORT_LINKS
902         if (linkname_len) {
903                 file->u.link = bp;
904                 memcpy(bp, linkname, linkname_len);
905                 bp += linkname_len;
906         }
907 #endif
908
909         if (sum_len) {
910                 file->u.sum = bp;
911                 file_checksum(thisname, bp, st.st_size);
912                 /*bp += sum_len;*/
913         }
914
915         file->basedir = flist_dir;
916
917         if (!S_ISDIR(st.st_mode))
918                 stats.total_size += st.st_size;
919
920         return file;
921 }
922
923
924 void send_file_name(int f, struct file_list *flist, char *fname,
925                     int recursive, unsigned short base_flags)
926 {
927         struct file_struct *file;
928         char fbuf[MAXPATHLEN];
929         extern int delete_excluded;
930
931         /* f is set to -1 when calculating deletion file list */
932         file = make_file(fname, flist,
933             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
934
935         if (!file)
936                 return;
937
938         maybe_emit_filelist_progress(flist);
939
940         flist_expand(flist);
941
942         if (write_batch)
943                 file->flags |= FLAG_TOP_DIR;
944
945         if (file->basename[0]) {
946                 flist->files[flist->count++] = file;
947                 send_file_entry(file, f, base_flags);
948         }
949
950         if (recursive && S_ISDIR(file->mode)
951             && !(file->flags & FLAG_MOUNT_POINT)) {
952                 struct exclude_list_struct last_list = local_exclude_list;
953                 local_exclude_list.head = local_exclude_list.tail = NULL;
954                 send_directory(f, flist, f_name_to(file, fbuf));
955                 free_exclude_list(&local_exclude_list);
956                 local_exclude_list = last_list;
957         }
958 }
959
960
961 static void send_directory(int f, struct file_list *flist, char *dir)
962 {
963         DIR *d;
964         struct dirent *di;
965         char fname[MAXPATHLEN];
966         unsigned int offset;
967         char *p;
968
969         d = opendir(dir);
970         if (!d) {
971                 io_error |= IOERR_GENERAL;
972                 rprintf(FERROR, "opendir %s failed: %s\n",
973                         full_fname(dir), strerror(errno));
974                 return;
975         }
976
977         offset = strlcpy(fname, dir, MAXPATHLEN);
978         p = fname + offset;
979         if (offset >= MAXPATHLEN || p[-1] != '/') {
980                 if (offset >= MAXPATHLEN - 1) {
981                         io_error |= IOERR_GENERAL;
982                         rprintf(FERROR, "skipping long-named directory: %s\n",
983                                 full_fname(fname));
984                         closedir(d);
985                         return;
986                 }
987                 *p++ = '/';
988                 offset++;
989         }
990
991         if (cvs_exclude) {
992                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
993                     < MAXPATHLEN - offset) {
994                         add_exclude_file(&local_exclude_list, fname,
995                                          XFLG_WORD_SPLIT | XFLG_WORDS_ONLY);
996                 } else {
997                         io_error |= IOERR_GENERAL;
998                         rprintf(FINFO,
999                                 "cannot cvs-exclude in long-named directory %s\n",
1000                                 full_fname(fname));
1001                 }
1002         }
1003
1004         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1005                 char *dname = d_name(di);
1006                 if (dname[0] == '.' && (dname[1] == '\0'
1007                     || (dname[1] == '.' && dname[2] == '\0')))
1008                         continue;
1009                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1010                         send_file_name(f, flist, fname, recurse, 0);
1011                 else {
1012                         io_error |= IOERR_GENERAL;
1013                         rprintf(FINFO,
1014                                 "cannot send long-named file %s\n",
1015                                 full_fname(fname));
1016                 }
1017         }
1018         if (errno) {
1019                 io_error |= IOERR_GENERAL;
1020                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1021                         dir, errno, strerror(errno));
1022         }
1023
1024         closedir(d);
1025 }
1026
1027
1028 /**
1029  * The delete_files() function in receiver.c sets f to -1 so that we just
1030  * construct the file list in memory without sending it over the wire.  It
1031  * also has the side-effect of ignoring user-excludes if delete_excluded
1032  * is set (so that the delete list includes user-excluded files).
1033  **/
1034 struct file_list *send_file_list(int f, int argc, char *argv[])
1035 {
1036         int l;
1037         STRUCT_STAT st;
1038         char *p, *dir, olddir[sizeof curr_dir];
1039         char lastpath[MAXPATHLEN] = "";
1040         struct file_list *flist;
1041         int64 start_write;
1042         int use_ff_fd = 0;
1043
1044         if (show_filelist_p() && f != -1)
1045                 start_filelist_progress("building file list");
1046
1047         start_write = stats.total_written;
1048
1049         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1050             "send_file_list");
1051
1052         if (f != -1) {
1053                 io_start_buffering_out(f);
1054                 if (filesfrom_fd >= 0) {
1055                         if (argv[0] && !push_dir(argv[0])) {
1056                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1057                                         full_fname(argv[0]), strerror(errno));
1058                                 exit_cleanup(RERR_FILESELECT);
1059                         }
1060                         use_ff_fd = 1;
1061                 }
1062         }
1063
1064         while (1) {
1065                 char fname2[MAXPATHLEN];
1066                 char *fname = fname2;
1067
1068                 if (use_ff_fd) {
1069                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1070                                 break;
1071                         sanitize_path(fname, NULL);
1072                 } else {
1073                         if (argc-- == 0)
1074                                 break;
1075                         strlcpy(fname, *argv++, MAXPATHLEN);
1076                         if (sanitize_paths)
1077                                 sanitize_path(fname, NULL);
1078                 }
1079
1080                 l = strlen(fname);
1081                 if (fname[l - 1] == '/') {
1082                         if (l == 2 && fname[0] == '.') {
1083                                 /* Turn "./" into just "." rather than "./." */
1084                                 fname[1] = '\0';
1085                         } else if (l < MAXPATHLEN) {
1086                                 fname[l++] = '.';
1087                                 fname[l] = '\0';
1088                         }
1089                 }
1090
1091                 if (link_stat(fname, &st) != 0) {
1092                         if (f != -1) {
1093                                 io_error |= IOERR_GENERAL;
1094                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1095                                         full_fname(fname), strerror(errno));
1096                         }
1097                         continue;
1098                 }
1099
1100                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1101                         rprintf(FINFO, "skipping directory %s\n", fname);
1102                         continue;
1103                 }
1104
1105                 dir = NULL;
1106                 olddir[0] = '\0';
1107
1108                 if (!relative_paths) {
1109                         p = strrchr(fname, '/');
1110                         if (p) {
1111                                 *p = 0;
1112                                 if (p == fname)
1113                                         dir = "/";
1114                                 else
1115                                         dir = fname;
1116                                 fname = p + 1;
1117                         }
1118                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1119                         /* this ensures we send the intermediate directories,
1120                            thus getting their permissions right */
1121                         char *lp = lastpath, *fn = fname, *slash = fname;
1122                         *p = 0;
1123                         /* Skip any initial directories in our path that we
1124                          * have in common with lastpath. */
1125                         while (*fn && *lp == *fn) {
1126                                 if (*fn == '/')
1127                                         slash = fn;
1128                                 lp++, fn++;
1129                         }
1130                         *p = '/';
1131                         if (fn != p || (*lp && *lp != '/')) {
1132                                 int copy_links_saved = copy_links;
1133                                 int recurse_saved = recurse;
1134                                 copy_links = copy_unsafe_links;
1135                                 /* set recurse to 1 to prevent make_file
1136                                  * from ignoring directory, but still
1137                                  * turn off the recursive parameter to
1138                                  * send_file_name */
1139                                 recurse = 1;
1140                                 while ((slash = strchr(slash+1, '/')) != 0) {
1141                                         *slash = 0;
1142                                         send_file_name(f, flist, fname, 0, 0);
1143                                         *slash = '/';
1144                                 }
1145                                 copy_links = copy_links_saved;
1146                                 recurse = recurse_saved;
1147                                 *p = 0;
1148                                 strlcpy(lastpath, fname, sizeof lastpath);
1149                                 *p = '/';
1150                         }
1151                 }
1152
1153                 if (!*fname)
1154                         fname = ".";
1155
1156                 if (dir && *dir) {
1157                         static char *lastdir;
1158                         static int lastdir_len;
1159
1160                         strcpy(olddir, curr_dir); /* can't overflow */
1161
1162                         if (!push_dir(dir)) {
1163                                 io_error |= IOERR_GENERAL;
1164                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1165                                         full_fname(dir), strerror(errno));
1166                                 continue;
1167                         }
1168
1169                         if (lastdir && strcmp(lastdir, dir) == 0) {
1170                                 flist_dir = lastdir;
1171                                 flist_dir_len = lastdir_len;
1172                         } else {
1173                                 flist_dir = lastdir = strdup(dir);
1174                                 flist_dir_len = lastdir_len = strlen(dir);
1175                         }
1176                 }
1177
1178                 if (one_file_system)
1179                         set_filesystem(fname);
1180
1181                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1182
1183                 if (olddir[0]) {
1184                         flist_dir = NULL;
1185                         flist_dir_len = 0;
1186                         if (!pop_dir(olddir)) {
1187                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1188                                         full_fname(dir), strerror(errno));
1189                                 exit_cleanup(RERR_FILESELECT);
1190                         }
1191                 }
1192         }
1193
1194         if (f != -1) {
1195                 send_file_entry(NULL, f, 0);
1196
1197                 if (show_filelist_p())
1198                         finish_filelist_progress(flist);
1199         }
1200
1201         if (flist->hlink_pool) {
1202                 pool_destroy(flist->hlink_pool);
1203                 flist->hlink_pool = NULL;
1204         }
1205
1206         clean_flist(flist, 0, 0);
1207
1208         if (f != -1) {
1209                 /* Now send the uid/gid list. This was introduced in
1210                  * protocol version 15 */
1211                 send_uid_list(f);
1212
1213                 /* send the io_error flag */
1214                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1215
1216                 io_end_buffering();
1217                 stats.flist_size = stats.total_written - start_write;
1218                 stats.num_files = flist->count;
1219                 if (write_batch)
1220                         write_batch_flist_info(flist->count, flist->files);
1221         }
1222
1223         if (verbose > 3)
1224                 output_flist(flist);
1225
1226         if (verbose > 2)
1227                 rprintf(FINFO, "send_file_list done\n");
1228
1229         return flist;
1230 }
1231
1232
1233 struct file_list *recv_file_list(int f)
1234 {
1235         struct file_list *flist;
1236         unsigned short flags;
1237         int64 start_read;
1238         extern int list_only;
1239
1240         if (show_filelist_p())
1241                 start_filelist_progress("receiving file list");
1242
1243         start_read = stats.total_read;
1244
1245         flist = flist_new(WITH_HLINK, "recv_file_list");
1246
1247         flist->count = 0;
1248         flist->malloced = 1000;
1249         flist->files = new_array(struct file_struct *, flist->malloced);
1250         if (!flist->files)
1251                 goto oom;
1252
1253
1254         while ((flags = read_byte(f)) != 0) {
1255                 int i = flist->count;
1256
1257                 flist_expand(flist);
1258
1259                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1260                         flags |= read_byte(f) << 8;
1261                 receive_file_entry(&flist->files[i], flags, flist, f);
1262
1263                 if (S_ISREG(flist->files[i]->mode))
1264                         stats.total_size += flist->files[i]->length;
1265
1266                 flist->count++;
1267
1268                 maybe_emit_filelist_progress(flist);
1269
1270                 if (verbose > 2) {
1271                         rprintf(FINFO, "recv_file_name(%s)\n",
1272                                 f_name(flist->files[i]));
1273                 }
1274         }
1275         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1276
1277         if (verbose > 2)
1278                 rprintf(FINFO, "received %d names\n", flist->count);
1279
1280         if (show_filelist_p())
1281                 finish_filelist_progress(flist);
1282
1283         clean_flist(flist, relative_paths, 1);
1284
1285         if (f != -1) {
1286                 /* Now send the uid/gid list. This was introduced in
1287                  * protocol version 15 */
1288                 recv_uid_list(f, flist);
1289
1290                 if (!read_batch) {
1291                         /* Recv the io_error flag */
1292                         if (lp_ignore_errors(module_id) || ignore_errors)
1293                                 read_int(f);
1294                         else
1295                                 io_error |= read_int(f);
1296                 }
1297         }
1298
1299         if (verbose > 3)
1300                 output_flist(flist);
1301
1302         if (list_only) {
1303                 int i;
1304                 for (i = 0; i < flist->count; i++)
1305                         list_file_entry(flist->files[i]);
1306         }
1307
1308         if (verbose > 2)
1309                 rprintf(FINFO, "recv_file_list done\n");
1310
1311         stats.flist_size = stats.total_read - start_read;
1312         stats.num_files = flist->count;
1313
1314         return flist;
1315
1316 oom:
1317         out_of_memory("recv_file_list");
1318         return NULL;            /* not reached */
1319 }
1320
1321
1322 int file_compare(struct file_struct **file1, struct file_struct **file2)
1323 {
1324         struct file_struct *f1 = *file1;
1325         struct file_struct *f2 = *file2;
1326
1327         if (!f1->basename && !f2->basename)
1328                 return 0;
1329         if (!f1->basename)
1330                 return -1;
1331         if (!f2->basename)
1332                 return 1;
1333         if (f1->dirname == f2->dirname)
1334                 return u_strcmp(f1->basename, f2->basename);
1335         return f_name_cmp(f1, f2);
1336 }
1337
1338
1339 int flist_find(struct file_list *flist, struct file_struct *f)
1340 {
1341         int low = 0, high = flist->count - 1;
1342
1343         while (high >= 0 && !flist->files[high]->basename) high--;
1344
1345         if (high < 0)
1346                 return -1;
1347
1348         while (low != high) {
1349                 int mid = (low + high) / 2;
1350                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1351                 if (ret == 0)
1352                         return flist_up(flist, mid);
1353                 if (ret > 0)
1354                         high = mid;
1355                 else
1356                         low = mid + 1;
1357         }
1358
1359         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1360                 return flist_up(flist, low);
1361         return -1;
1362 }
1363
1364 /*
1365  * Free up any resources a file_struct has allocated
1366  * and clear the file.
1367  */
1368 void clear_file(int i, struct file_list *flist)
1369 {
1370         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1371                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1372         memset(flist->files[i], 0, file_struct_len);
1373 }
1374
1375
1376 /*
1377  * allocate a new file list
1378  */
1379 struct file_list *flist_new(int with_hlink, char *msg)
1380 {
1381         struct file_list *flist;
1382
1383         flist = new(struct file_list);
1384         if (!flist)
1385                 out_of_memory(msg);
1386
1387         memset(flist, 0, sizeof (struct file_list));
1388
1389         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1390             out_of_memory, POOL_INTERN)))
1391                 out_of_memory(msg);
1392
1393 #if SUPPORT_HARD_LINKS
1394         if (with_hlink && preserve_hard_links) {
1395                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1396                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1397                         out_of_memory(msg);
1398         }
1399 #endif
1400
1401         return flist;
1402 }
1403
1404 /*
1405  * free up all elements in a flist
1406  */
1407 void flist_free(struct file_list *flist)
1408 {
1409         pool_destroy(flist->file_pool);
1410         pool_destroy(flist->hlink_pool);
1411         free(flist->files);
1412         free(flist);
1413 }
1414
1415
1416 /*
1417  * This routine ensures we don't have any duplicate names in our file list.
1418  * duplicate names can cause corruption because of the pipelining
1419  */
1420 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1421 {
1422         int i, prev_i = 0;
1423
1424         if (!flist || flist->count == 0)
1425                 return;
1426
1427         qsort(flist->files, flist->count,
1428             sizeof flist->files[0], (int (*)()) file_compare);
1429
1430         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1431                 if (flist->files[i]->basename) {
1432                         prev_i = i;
1433                         break;
1434                 }
1435         }
1436         while (++i < flist->count) {
1437                 if (!flist->files[i]->basename)
1438                         continue;
1439                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1440                         if (verbose > 1 && !am_server) {
1441                                 rprintf(FINFO,
1442                                         "removing duplicate name %s from file list %d\n",
1443                                         f_name(flist->files[i]), i);
1444                         }
1445                         /* Make sure that if we unduplicate '.', that we don't
1446                          * lose track of a user-specified starting point (or
1447                          * else deletions will mysteriously fail with -R). */
1448                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1449                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1450
1451                         clear_file(i, flist);
1452                 } else
1453                         prev_i = i;
1454         }
1455
1456         if (strip_root) {
1457                 /* we need to strip off the root directory in the case
1458                    of relative paths, but this must be done _after_
1459                    the sorting phase */
1460                 for (i = 0; i < flist->count; i++) {
1461                         if (flist->files[i]->dirname &&
1462                             flist->files[i]->dirname[0] == '/') {
1463                                 memmove(&flist->files[i]->dirname[0],
1464                                         &flist->files[i]->dirname[1],
1465                                         strlen(flist->files[i]->dirname));
1466                         }
1467
1468                         if (flist->files[i]->dirname &&
1469                             !flist->files[i]->dirname[0]) {
1470                                 flist->files[i]->dirname = NULL;
1471                         }
1472                 }
1473         }
1474 }
1475
1476 static void output_flist(struct file_list *flist)
1477 {
1478         char uidbuf[16], gidbuf[16];
1479         struct file_struct *file;
1480         int i;
1481
1482         for (i = 0; i < flist->count; i++) {
1483                 file = flist->files[i];
1484                 if (am_root && preserve_uid)
1485                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1486                 else
1487                         *uidbuf = '\0';
1488                 if (preserve_gid && file->gid != GID_NONE)
1489                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1490                 else
1491                         *gidbuf = '\0';
1492                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1493                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1494                         NS(file->basename), (int) file->mode,
1495                         (double) file->length, uidbuf, gidbuf);
1496         }
1497 }
1498
1499
1500 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1501
1502 /* Compare the names of two file_struct entities, just like strcmp()
1503  * would do if it were operating on the joined strings.  We assume
1504  * that there are no 0-length strings.
1505  */
1506 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1507 {
1508         int dif;
1509         const uchar *c1, *c2;
1510         enum fnc_state state1, state2;
1511
1512         if (!f1 || !f1->basename) {
1513                 if (!f2 || !f2->basename)
1514                         return 0;
1515                 return -1;
1516         }
1517         if (!f2 || !f2->basename)
1518                 return 1;
1519
1520         if (!(c1 = (uchar*)f1->dirname)) {
1521                 state1 = fnc_BASE;
1522                 c1 = (uchar*)f1->basename;
1523         } else if (!*c1) {
1524                 state1 = fnc_SLASH;
1525                 c1 = (uchar*)"/";
1526         } else
1527                 state1 = fnc_DIR;
1528         if (!(c2 = (uchar*)f2->dirname)) {
1529                 state2 = fnc_BASE;
1530                 c2 = (uchar*)f2->basename;
1531         } else if (!*c2) {
1532                 state2 = fnc_SLASH;
1533                 c2 = (uchar*)"/";
1534         } else
1535                 state2 = fnc_DIR;
1536
1537         while (1) {
1538                 if ((dif = (int)*c1 - (int)*c2) != 0)
1539                         break;
1540                 if (!*++c1) {
1541                         switch (state1) {
1542                         case fnc_DIR:
1543                                 state1 = fnc_SLASH;
1544                                 c1 = (uchar*)"/";
1545                                 break;
1546                         case fnc_SLASH:
1547                                 state1 = fnc_BASE;
1548                                 c1 = (uchar*)f1->basename;
1549                                 break;
1550                         case fnc_BASE:
1551                                 break;
1552                         }
1553                 }
1554                 if (!*++c2) {
1555                         switch (state2) {
1556                         case fnc_DIR:
1557                                 state2 = fnc_SLASH;
1558                                 c2 = (uchar*)"/";
1559                                 break;
1560                         case fnc_SLASH:
1561                                 state2 = fnc_BASE;
1562                                 c2 = (uchar*)f2->basename;
1563                                 break;
1564                         case fnc_BASE:
1565                                 if (!*c1)
1566                                         return 0;
1567                                 break;
1568                         }
1569                 }
1570         }
1571
1572         return dif;
1573 }
1574
1575
1576 /* Return a copy of the full filename of a flist entry, using the indicated
1577  * buffer.  No size-checking is done because we checked the size when creating
1578  * the file_struct entry.
1579  */
1580 char *f_name_to(struct file_struct *f, char *fbuf)
1581 {
1582         if (!f || !f->basename)
1583                 return NULL;
1584
1585         if (f->dirname) {
1586                 int len = strlen(f->dirname);
1587                 memcpy(fbuf, f->dirname, len);
1588                 fbuf[len] = '/';
1589                 strcpy(fbuf + len + 1, f->basename);
1590         } else
1591                 strcpy(fbuf, f->basename);
1592         return fbuf;
1593 }
1594
1595
1596 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1597  */
1598 char *f_name(struct file_struct *f)
1599 {
1600         static char names[5][MAXPATHLEN];
1601         static unsigned int n;
1602
1603         n = (n + 1) % (sizeof names / sizeof names[0]);
1604
1605         return f_name_to(f, names[n]);
1606 }